let 的英语意思
letlet1 /let/ verb (past tense and past participle let, present participle letting) 
查看全部语言翻译1allow [transitive not in passive] to allow someone to do something允许某人做某事: 
I can’t come out tonight – my dad won’t let me.我今晚不能出去——我爸不让我去。let somebody do something Let Johnny have a go on the computer now.现在让约翰尼用一下电脑。 Some people seem to let their kids do whatever they like.有些人似乎任由孩子为所欲为。 Let me have a look at that letter.让我看看那封信。let somebody have something (=give something to someone)（=把某物给某人） I can let you have another £10, but no more.我最多再给你10英镑，不能再多了。► see thesaurus at allowRegister语体In written English, people often prefer to use allow somebody to do something rather than let somebody do something, as it is slightly more formal:· We must allow young people to develop independence.在书面英语中，人们往往更倾向于使用 allow somebody to do something，而非 let somebody do something，因为前者略显正式：· We must allow young people to develop independence.2not stop something happening [transitive] to not stop something happening, or to make it possible for it to happen不阻止某事发生，或使某事成为可能let somebody/something do something Jenny let the note fall to the ground.珍妮任由纸条落到了地上。 Don’t let anyone know it was me who told you.别让任何人知道是我告诉你的。 Max let the door swing open.麦克斯任由门敞开着。 Let the cookies cool down before you try them.让饼干冷却后再尝。let yourself be beaten/persuaded/fooled etc I stupidly let myself be persuaded to take part in a live debate.我愚蠢地被说服参加了一场现场辩论。3let go a)to stop holding something or someone松开某物或某人: Let go! You’re hurting me.放手！你弄疼我了。let of The guard let go of the lead, and the dog lunged forward.警卫松开了牵引绳，狗猛地向前扑去。 b)to accept that you cannot change something and stop thinking or worrying about it接受无法改变的事实，不再为其烦恼或忧虑: Sometimes you just have to learn to let go.有时候你只需要学会放下。4let somebody go a)to allow someone to leave a place where they have been kept允许被羁押的人离开；释放 SYN release: The police had to let him go through lack of evidence.警方因证据不足不得不将他释放。 The hijackers were persuaded to let some hostages go.劫机者被说服释放了部分人质。 b)to make someone leave their job – used in order to avoid saying this directly让某人离职——用于委婉表达: I’m afraid we had to let several of our staff go.很遗憾，我们不得不让几名员工离职了。SPOKEN PHRASES5suggest/offer [transitive] used to make a suggestion or to offer help用于提出建议或提供帮助let’s do something Let’s make a start, shall we?我们开始吧，好吗？ Let’s all get together over Christmas.圣诞节咱们大家聚在一起吧。 Let’s not jump to conclusions – he might have been delayed.我们别急着下结论——他可能只是被耽误了。let somebody do something Let me help you with those bags.让我帮你拿那些包。 Let me give you a piece of advice.让我给你提个建议。let’s hope (that) Let’s hope he got your message in time.希望他及时收到了你的消息。don’t let’s do something British English informal非正式 Don’t let’s argue like this.咱们别这样争吵了。6let’s see (also let me see) used when you are thinking about or trying to remember something用于思考或试图回忆某事时: Today’s date is – let me see, March 20th.今天是——让我想想，3月20日。 Now, let’s see, where did I put your application form?好，让我想想，我把你的申请表放哪了？7let me think used to say that you need time to think about or remember something用于表示需要时间思考或回忆某事: What was his name, now? Let me think.他叫什么名字来着？让我想想。8let him/her/them etc used to say that you do not care if someone does something they are threatening to do用于表示不在乎对方是否付诸威胁行动: ‘She says she’s going to sell her story to the newspapers!’ ‘Well, let her!’"她说要把她的故事卖给报社！"——"随她去吧！"9let’s face it/let’s be honest used to say that someone must accept an unpleasant fact or situation用于表示某人必须接受不愉快的事实或处境: Let’s face it, no one’s going to lend us any money.现实点吧，没人会借钱给我们的。10let’s just say (that) used to say that you are not going to give someone all the details about something用于表示不打算告诉对方所有细节: ‘So who did it?’ ‘Let’s just say it wasn’t anyone in this family.’"那到底是谁干的？""我只能说，不是这家人中的任何一个。"11let yourself go a)to relax completely and enjoy yourself彻底放松，尽情享受: For goodness sake, Peter, why don’t you just let yourself go for once?拜托了，彼得，你就放开心情享受一次嘛！ b)to stop looking after yourself properly, for example by not caring about your appearance不再好好照料自己，例如不再在意自己的外表: Poor Dad. He’s really let himself go since Mum died.可怜的爸爸。自从妈妈去世后，他真的一点都不照顾自己了。12let something go a)to not punish or criticize someone for something they have done wrong不因某人的过失而惩罚或批评其: OK, I’ll let it go this time.好吧，这次就算了。 b)to stop worrying or thinking too much about something不再过分烦恼或思虑某事: It’s time to let the past go.是时候放下过去了。 c)informal非正式 to sell something for a particular amount以某一价格出售某物let something go for £20/$200 etc I couldn’t let it go for less than £300.我不可能以低于300英镑的价格把它卖掉。13wish [transitive not in passive] used to say that you wish or hope that something happens, or does not happen用于表达希望某事发生或不发生的愿望(not) let somebody/something do something Don’t let him be the one who died, she prayed."但愿死的人不是他，"她祈祷道。14let alone used after a negative statement to say that the next thing you mention is even more unlikely用于否定句之后，表示接下来提及的事物更不可能发生: The baby can’t even sit up yet, let alone walk!这孩子连坐都还不会，更别说走路了！15let something drop/rest/lie to stop talking about or trying to deal with something停止讨论或试图处理某事: It seems the press are not going to let the matter rest.看来媒体不打算就此放下这件事。16let slip to accidentally tell someone something that should have been kept secret无意间泄露了本应保密的事情let that Liz let slip that she’d seen him quite recently.莉兹无意中透露她最近刚见过他。17rent [transitive] especially British English to charge someone an amount of money for the use of a room or building向某人收取使用房间或建筑物的费用；出租 SYN lease: Interhome has over 20,000 houses to let across Europe.Interhome 在欧洲各地有两万多套房屋出租。let something to somebody I’ve let my spare room to a student.我已把空余房间租给了一名学生。let somebody something Would you consider letting me the garage for a few months?您愿意考虑把车库租给我几个月吗？let something out to somebody We let the smaller studios out to local artists.我们把较小的工作室出租给当地艺术家。To Let written书面 (=written on a sign outside a building to show that it is available for renting)（=写在建筑物外告示牌上，表示该处可供出租）18mathematics let something be/equal/represent something technical术语 used in mathematics to mean that you give something a particular measurement or value in order to make a calculation用于数学，表示为进行计算而给某量赋予特定的度量或值: Let angle A equal the sum of the two opposite sides.设角A等于两对边之和。19let yourself in for something informal非正式 to do something that will cause you a lot of trouble做某事而给自己带来大麻烦: I don’t think Carol realizes what she’s letting herself in for.我觉得Carol没意识到她将自找什么麻烦。20never let a day/week/year etc go by without doing something used to say that someone does a particular thing very regularly用于表示某人极为规律地做某事: They never seem to let a year go by without introducing a new version of their software.他们似乎每年都会推出新版本软件，从不间断。21let the good times roll informal非正式 used to say that it is time for people to start having fun用于表示该让大家开始享乐了22let somebody have it informal非正式 to attack someone攻击某人 → let fly (something) at fly1(17), → let it all hang out at hang out, → live and let live at live1(21), → let it/her rip at rip1(6), → let rip at rip1(5)let somebody/something ↔ down phrasal verb1to not do something that someone trusts or expects you to do辜负某人的信任或期望，未能做某事: She had been let down badly in the past.她过去曾被严重辜负过。 The worst feeling is having let our fans down.最糟糕的感受是辜负了我们的粉丝。let the side down British English (=disappoint a group of people that you belong to)（=令所属群体感到失望）2to make someone or something less successful or effective使某人或某事的成效降低: McKenzie’s judgement rarely lets him down.麦肯齐的判断力鲜少让他失望。3to move something or someone to a lower position将某物或某人移至较低位置: Let down a rope so that I can climb up.放下一根绳子让我爬上去。 Carefully, she let herself down into the water.她小心翼翼地把自己放入水中。4let your hair down informal非正式 to relax and enjoy yourself, especially after working hard放松并享受，尤其是在努力工作之后: Visitors young and old let their hair down and enjoyed the show.老老少少的游客都尽情放松，享受演出。5let your guard/defences down to relax and stop worrying about what might happen or what someone might find out about you放松下来，不再担忧可能发生的事或别人可能了解到的自己的情况: Maggie never really lets her guard down, does she?玛吉从不真正放松警惕，是吧？6let somebody down lightly/gently to give someone bad news in a way that will not upset them too much以不会让人太过难受的方式告知坏消息: I get asked out on dates quite often, but I always try to let the guy down gently.我经常被人约出去，但我总是尽量温和地拒绝对方。7British English to allow the air to escape from something so that it loses its shape and becomes flat让某物中的空气逸出，使其失去形状变扁: Someone’s let my tyres down!有人把我的轮胎气放掉了！8to make a piece of clothing longer by unfolding a folded edge通过展开折叠的边缘使衣物变长 OPP take upGRAMMAR: Comparison语法：比较let• You let someone do something: · Her boss lets her work from home. ✗Don’t say: let someone to do something• let 的正确用法为 let someone do something：· Her boss lets her work from home. ✗不能说：let someone to do somethingLet is not used in the passive.let 不用于被动语态。allow• You allow someone to do something: · Her boss allows her to work from home.• allow 的用法为 allow someone to do something：· Her boss allows her to work from home.• Something is allowed: · Working from home is allowed.• 某事是被允许的：· Working from home is allowed.Allow is often used in the passive.allow 常用于被动语态。permit• Something is permitted: · Working from home is permitted.• 某事是被准许的：· Working from home is permitted.• Someone is permitted to do something: · Employees are permitted to work from home.• 某人被准许做某事：· Employees are permitted to work from home.Permit is usually used in the passive.permit 通常用于被动语态。let somebody in on something phrasal verb to tell something that is secret or only known by a few people透露秘密或鲜为人知的事情: TV chef Raymond Blanc lets us in on the secrets of his kitchen.电视厨师雷蒙德·布朗向我们透露了他厨房的秘密。 Would someone mind letting me in on the joke?能告诉我这个笑话是怎么回事吗？let somebody/something into something phrasal verb1to tell someone something that is secret or private将秘密或私密事项告知某人: It was time to let the rest of the family into the secret.是时候把这个秘密告诉家里其他人了。2technical术语 to put something such as a window or a decoration into a wall将窗户或装饰物等嵌入墙壁: Two large windows were let into the wall each side of the door.门的两侧各嵌入了一扇大窗户。GRAMMAR Let into is usually passive in this meaning.let somebody/something off phrasal verb1to not punish someone不惩罚某人；放过某人: I’ll let you off this time, but don’t do it again.这次就放过你，但别再犯了。let off with After checking our identities, the customs men let us off with a warning.海关人员核查我们的身份后，对我们提出警告就放人了。let somebody off the hook (=allow someone to escape punishment or criticism)（=让某人逃脱惩罚或批评） He’d decided to make Sandra wait before letting her off the hook.他决定先让桑德拉等一会儿再放过她。let somebody off lightly/easily (=give someone a less serious punishment than they deserve)（=给予某人比其应受到的更轻的处罚） I think young criminals are let off far too lightly.我认为对青少年罪犯的处罚实在太轻了。2let somebody off (something) if someone in authority lets you off something you should do, they give you permission not to do it如果权威人士让你免于做本应做的某事，即给你豁免该事的许可: You’ve worked hard all week, so I’ll let you off today.你整周都很努力，今天就免了。3let something ↔ off to make something explode使某物爆炸；引爆: One boy had let off a firework in class.一个男孩在课堂上点燃了一枚烟花。 → let/blow off steam at steam1(4)let on phrasal verb informal非正式 to tell someone something, especially something you have been keeping secret告知某人某事，尤其是一直保密的事let on (that) Don’t let on that I told you.别透露是我告诉你的。let on who/why/how etc We never did let on how we found out.我们始终没有透露是怎么发现的。 I’m sure he knows more than he’s letting on.我确信他知道的比他表露的要多。let out phrasal verb1let out something to suddenly make a loud sound such as a shout or cry突然发出叫喊或哭泣等响亮的声音let out a scream/cry/roar etc He let out a cry of disbelief.他发出一声难以置信的叫声。2let something ↔ out to make a piece of clothing wider or looser, especially because it is too tight使衣物变宽或变松，尤其是因为太紧3let something ↔ out British English to charge someone an amount of money for the use of a room or building向某人收取使用房间或建筑物的费用；出租: We’re letting out our son’s old room to a student.我们正在把儿子原来的房间租给一名学生。4American English if a school, college, film etc lets out, it ends and the people attending it can leave如果学校、大学、电影等散场，指其结束、参加者可以离开: What time does the movie let out?电影什么时候散场？ → let the cat out of the bag at cat(2)let up phrasal verb1to become less severe or harmful变得不那么严酷或有害: The wind had dropped and the rain gradually let up.风停了，雨也逐渐减弱。2to be less severe, unkind, or violent towards someone对某人态度变得不那么严厉、刻薄或粗暴: Even when the crowd had scattered, the police didn’t let up.即使人群已经散去，警察也没有收手。3to stop working as hard as you were停止像以前那样努力工作: You’re doing really well, but you can’t afford to let up now.你做得很好，但现在不能松劲。
查看全部语言翻译1allow [transitive not in passive] to allow someone to do something允许某人做某事: I can’t come out tonight – my dad won’t let me.我今晚不能出去——我爸不让我去。let somebody do something Let Johnny have a go on the computer now.现在让约翰尼用一下电脑。 Some people seem to let their kids do whatever they like.有些人似乎任由孩子为所欲为。 Let me have a look at that letter.让我看看那封信。let somebody have something (=give something to someone)（=把某物给某人） I can let you have another £10, but no more.我最多再给你10英镑，不能再多了。► see thesaurus at allowRegister语体In written English, people often prefer to use allow somebody to do something rather than let somebody do something, as it is slightly more formal:· We must allow young people to develop independence.在书面英语中，人们往往更倾向于使用 allow somebody to do something，而非 let somebody do something，因为前者略显正式：· We must allow young people to develop independence.2not stop something happening [transitive] to not stop something happening, or to make it possible for it to happen不阻止某事发生，或使某事成为可能let somebody/something do something Jenny let the note fall to the ground.珍妮任由纸条落到了地上。 Don’t let anyone know it was me who told you.别让任何人知道是我告诉你的。 Max let the door swing open.麦克斯任由门敞开着。 Let the cookies cool down before you try them.让饼干冷却后再尝。let yourself be beaten/persuaded/fooled etc I stupidly let myself be persuaded to take part in a live debate.我愚蠢地被说服参加了一场现场辩论。3let go a)to stop holding something or someone松开某物或某人: Let go! You’re hurting me.放手！你弄疼我了。let of The guard let go of the lead, and the dog lunged forward.警卫松开了牵引绳，狗猛地向前扑去。 b)to accept that you cannot change something and stop thinking or worrying about it接受无法改变的事实，不再为其烦恼或忧虑: Sometimes you just have to learn to let go.有时候你只需要学会放下。4let somebody go a)to allow someone to leave a place where they have been kept允许被羁押的人离开；释放 SYN release: The police had to let him go through lack of evidence.警方因证据不足不得不将他释放。 The hijackers were persuaded to let some hostages go.劫机者被说服释放了部分人质。 b)to make someone leave their job – used in order to avoid saying this directly让某人离职——用于委婉表达: I’m afraid we had to let several of our staff go.很遗憾，我们不得不让几名员工离职了。SPOKEN PHRASES5suggest/offer [transitive] used to make a suggestion or to offer help用于提出建议或提供帮助let’s do something Let’s make a start, shall we?我们开始吧，好吗？ Let’s all get together over Christmas.圣诞节咱们大家聚在一起吧。 Let’s not jump to conclusions – he might have been delayed.我们别急着下结论——他可能只是被耽误了。let somebody do something Let me help you with those bags.让我帮你拿那些包。 Let me give you a piece of advice.让我给你提个建议。let’s hope (that) Let’s hope he got your message in time.希望他及时收到了你的消息。don’t let’s do something British English informal非正式 Don’t let’s argue like this.咱们别这样争吵了。6let’s see (also let me see) used when you are thinking about or trying to remember something用于思考或试图回忆某事时: Today’s date is – let me see, March 20th.今天是——让我想想，3月20日。 Now, let’s see, where did I put your application form?好，让我想想，我把你的申请表放哪了？7let me think used to say that you need time to think about or remember something用于表示需要时间思考或回忆某事: What was his name, now? Let me think.他叫什么名字来着？让我想想。8let him/her/them etc used to say that you do not care if someone does something they are threatening to do用于表示不在乎对方是否付诸威胁行动: ‘She says she’s going to sell her story to the newspapers!’ ‘Well, let her!’"她说要把她的故事卖给报社！"——"随她去吧！"9let’s face it/let’s be honest used to say that someone must accept an unpleasant fact or situation用于表示某人必须接受不愉快的事实或处境: Let’s face it, no one’s going to lend us any money.现实点吧，没人会借钱给我们的。10let’s just say (that) used to say that you are not going to give someone all the details about something用于表示不打算告诉对方所有细节: ‘So who did it?’ ‘Let’s just say it wasn’t anyone in this family.’"那到底是谁干的？""我只能说，不是这家人中的任何一个。"11let yourself go a)to relax completely and enjoy yourself彻底放松，尽情享受: For goodness sake, Peter, why don’t you just let yourself go for once?拜托了，彼得，你就放开心情享受一次嘛！ b)to stop looking after yourself properly, for example by not caring about your appearance不再好好照料自己，例如不再在意自己的外表: Poor Dad. He’s really let himself go since Mum died.可怜的爸爸。自从妈妈去世后，他真的一点都不照顾自己了。12let something go a)to not punish or criticize someone for something they have done wrong不因某人的过失而惩罚或批评其: OK, I’ll let it go this time.好吧，这次就算了。 b)to stop worrying or thinking too much about something不再过分烦恼或思虑某事: It’s time to let the past go.是时候放下过去了。 c)informal非正式 to sell something for a particular amount以某一价格出售某物let something go for £20/$200 etc I couldn’t let it go for less than £300.我不可能以低于300英镑的价格把它卖掉。13wish [transitive not in passive] used to say that you wish or hope that something happens, or does not happen用于表达希望某事发生或不发生的愿望(not) let somebody/something do something Don’t let him be the one who died, she prayed."但愿死的人不是他，"她祈祷道。14let alone used after a negative statement to say that the next thing you mention is even more unlikely用于否定句之后，表示接下来提及的事物更不可能发生: The baby can’t even sit up yet, let alone walk!这孩子连坐都还不会，更别说走路了！15let something drop/rest/lie to stop talking about or trying to deal with something停止讨论或试图处理某事: It seems the press are not going to let the matter rest.看来媒体不打算就此放下这件事。16let slip to accidentally tell someone something that should have been kept secret无意间泄露了本应保密的事情let that Liz let slip that she’d seen him quite recently.莉兹无意中透露她最近刚见过他。17rent [transitive] especially British English to charge someone an amount of money for the use of a room or building向某人收取使用房间或建筑物的费用；出租 SYN lease: Interhome has over 20,000 houses to let across Europe.Interhome 在欧洲各地有两万多套房屋出租。let something to somebody I’ve let my spare room to a student.我已把空余房间租给了一名学生。let somebody something Would you consider letting me the garage for a few months?您愿意考虑把车库租给我几个月吗？let something out to somebody We let the smaller studios out to local artists.我们把较小的工作室出租给当地艺术家。To Let written书面 (=written on a sign outside a building to show that it is available for renting)（=写在建筑物外告示牌上，表示该处可供出租）18mathematics let something be/equal/represent something technical术语 used in mathematics to mean that you give something a particular measurement or value in order to make a calculation用于数学，表示为进行计算而给某量赋予特定的度量或值: Let angle A equal the sum of the two opposite sides.设角A等于两对边之和。19let yourself in for something informal非正式 to do something that will cause you a lot of trouble做某事而给自己带来大麻烦: I don’t think Carol realizes what she’s letting herself in for.我觉得Carol没意识到她将自找什么麻烦。20never let a day/week/year etc go by without doing something used to say that someone does a particular thing very regularly用于表示某人极为规律地做某事: They never seem to let a year go by without introducing a new version of their software.他们似乎每年都会推出新版本软件，从不间断。21let the good times roll informal非正式 used to say that it is time for people to start having fun用于表示该让大家开始享乐了22let somebody have it informal非正式 to attack someone攻击某人 → let fly (something) at fly1(17), → let it all hang out at hang out, → live and let live at live1(21), → let it/her rip at rip1(6), → let rip at rip1(5)let somebody/something ↔ down phrasal verb1to not do something that someone trusts or expects you to do辜负某人的信任或期望，未能做某事: She had been let down badly in the past.她过去曾被严重辜负过。 The worst feeling is having let our fans down.最糟糕的感受是辜负了我们的粉丝。let the side down British English (=disappoint a group of people that you belong to)（=令所属群体感到失望）2to make someone or something less successful or effective使某人或某事的成效降低: McKenzie’s judgement rarely lets him down.麦肯齐的判断力鲜少让他失望。3to move something or someone to a lower position将某物或某人移至较低位置: Let down a rope so that I can climb up.放下一根绳子让我爬上去。 Carefully, she let herself down into the water.她小心翼翼地把自己放入水中。4let your hair down informal非正式 to relax and enjoy yourself, especially after working hard放松并享受，尤其是在努力工作之后: Visitors young and old let their hair down and enjoyed the show.老老少少的游客都尽情放松，享受演出。5let your guard/defences down to relax and stop worrying about what might happen or what someone might find out about you放松下来，不再担忧可能发生的事或别人可能了解到的自己的情况: Maggie never really lets her guard down, does she?玛吉从不真正放松警惕，是吧？6let somebody down lightly/gently to give someone bad news in a way that will not upset them too much以不会让人太过难受的方式告知坏消息: I get asked out on dates quite often, but I always try to let the guy down gently.我经常被人约出去，但我总是尽量温和地拒绝对方。7British English to allow the air to escape from something so that it loses its shape and becomes flat让某物中的空气逸出，使其失去形状变扁: Someone’s let my tyres down!有人把我的轮胎气放掉了！8to make a piece of clothing longer by unfolding a folded edge通过展开折叠的边缘使衣物变长 OPP take upGRAMMAR: Comparison语法：比较let• You let someone do something: · Her boss lets her work from home. ✗Don’t say: let someone to do something• let 的正确用法为 let someone do something：· Her boss lets her work from home. ✗不能说：let someone to do somethingLet is not used in the passive.let 不用于被动语态。allow• You allow someone to do something: · Her boss allows her to work from home.• allow 的用法为 allow someone to do something：· Her boss allows her to work from home.• Something is allowed: · Working from home is allowed.• 某事是被允许的：· Working from home is allowed.Allow is often used in the passive.allow 常用于被动语态。permit• Something is permitted: · Working from home is permitted.• 某事是被准许的：· Working from home is permitted.• Someone is permitted to do something: · Employees are permitted to work from home.• 某人被准许做某事：· Employees are permitted to work from home.Permit is usually used in the passive.permit 通常用于被动语态。let somebody in on something phrasal verb to tell something that is secret or only known by a few people透露秘密或鲜为人知的事情: TV chef Raymond Blanc lets us in on the secrets of his kitchen.电视厨师雷蒙德·布朗向我们透露了他厨房的秘密。 Would someone mind letting me in on the joke?能告诉我这个笑话是怎么回事吗？let somebody/something into something phrasal verb1to tell someone something that is secret or private将秘密或私密事项告知某人: It was time to let the rest of the family into the secret.是时候把这个秘密告诉家里其他人了。2technical术语 to put something such as a window or a decoration into a wall将窗户或装饰物等嵌入墙壁: Two large windows were let into the wall each side of the door.门的两侧各嵌入了一扇大窗户。GRAMMAR Let into is usually passive in this meaning.let somebody/something off phrasal verb1to not punish someone不惩罚某人；放过某人: I’ll let you off this time, but don’t do it again.这次就放过你，但别再犯了。let off with After checking our identities, the customs men let us off with a warning.海关人员核查我们的身份后，对我们提出警告就放人了。let somebody off the hook (=allow someone to escape punishment or criticism)（=让某人逃脱惩罚或批评） He’d decided to make Sandra wait before letting her off the hook.他决定先让桑德拉等一会儿再放过她。let somebody off lightly/easily (=give someone a less serious punishment than they deserve)（=给予某人比其应受到的更轻的处罚） I think young criminals are let off far too lightly.我认为对青少年罪犯的处罚实在太轻了。2let somebody off (something) if someone in authority lets you off something you should do, they give you permission not to do it如果权威人士让你免于做本应做的某事，即给你豁免该事的许可: You’ve worked hard all week, so I’ll let you off today.你整周都很努力，今天就免了。3let something ↔ off to make something explode使某物爆炸；引爆: One boy had let off a firework in class.一个男孩在课堂上点燃了一枚烟花。 → let/blow off steam at steam1(4)let on phrasal verb informal非正式 to tell someone something, especially something you have been keeping secret告知某人某事，尤其是一直保密的事let on (that) Don’t let on that I told you.别透露是我告诉你的。let on who/why/how etc We never did let on how we found out.我们始终没有透露是怎么发现的。 I’m sure he knows more than he’s letting on.我确信他知道的比他表露的要多。let out phrasal verb1let out something to suddenly make a loud sound such as a shout or cry突然发出叫喊或哭泣等响亮的声音let out a scream/cry/roar etc He let out a cry of disbelief.他发出一声难以置信的叫声。2let something ↔ out to make a piece of clothing wider or looser, especially because it is too tight使衣物变宽或变松，尤其是因为太紧3let something ↔ out British English to charge someone an amount of money for the use of a room or building向某人收取使用房间或建筑物的费用；出租: We’re letting out our son’s old room to a student.我们正在把儿子原来的房间租给一名学生。4American English if a school, college, film etc lets out, it ends and the people attending it can leave如果学校、大学、电影等散场，指其结束、参加者可以离开: What time does the movie let out?电影什么时候散场？ → let the cat out of the bag at cat(2)let up phrasal verb1to become less severe or harmful变得不那么严酷或有害: The wind had dropped and the rain gradually let up.风停了，雨也逐渐减弱。2to be less severe, unkind, or violent towards someone对某人态度变得不那么严厉、刻薄或粗暴: Even when the crowd had scattered, the police didn’t let up.即使人群已经散去，警察也没有收手。3to stop working as hard as you were停止像以前那样努力工作: You’re doing really well, but you can’t afford to let up now.你做得很好，但现在不能松劲。