sign 的英语意思
signsign1 /saɪn/ noun 
查看全部语言翻译1gives information [countable] a piece of paper, metal, or wood with words or a picture that gives people information, warnings, or instructions由纸张、金属或木材制成，上有文字或图片，向人们传递信息、警告或指示的标牌: 
a sign on the door门上的标牌 road signs路标 a no smoking sign禁止吸烟标志 Don’t ignore the fog warning signs.不要忽视大雾警告标志。2shows something is true [countable] an event, fact etc that shows that something is happening or that something is true or exists表明某事正在发生、某事属实或存在的事件、事实等 SYN indicationsign of A red morning sky is a sign of an impending storm.早晨天空红霞是暴风雨即将来临的征兆。 Crying is seen as a sign of weakness.哭泣被视为软弱的表现。 A paw print in the dust was a sign that a tiger was close.尘土中的爪印是老虎在附近的迹象。 There are signs that the situation is improving.有迹象表明形势正在好转。 There were no signs of forced entry into the house.没有强行闯入房屋的迹象。3movement or sound [countable] a movement, sound etc that you make in order to tell someone something为向某人传达信息而做出的动作、发出的声音等: the thumbs-up sign (=a sign that you make with your hand to show that something is successful)竖大拇指的手势（＝用手势表示某事成功的信号）give/make a sign Wait until I give the sign.等我发出信号。sign that Bruce made a sign that he was ready to leave.布鲁斯做了个示意，表示他准备好离开了。sign (for somebody) to do something Three short blasts on the whistle was the sign to begin.三声短促的哨声是开始的信号。4symbol [countable] a mark or shape that has a particular meaning具有特定含义的标记或符号 SYN symbol: the dollar sign美元符号 a minus sign减号5star sign [countable] (also star sign) a group of stars, representing one of 12 parts of the year, that some people believe influences your behaviour and your life代表一年十二个时段之一的星座，有些人相信它会影响人的行为和命运: What sign are you?你是什么星座的？6language [uncountable] a language that uses hand movements instead of spoken words, used by people who cannot hear用手势代替口头语言的语言，供听障人士使用 SYN sign language7there is no sign of somebody/something used to say that someone or something is not in a place or cannot be found用于表示某人或某物不在某处或无法找到: I waited for two hours but there was still no sign of her.我等了两个小时，但她仍然踪影全无。8sign of life a)a movement that shows that someone is alive, or something that shows that there are people in a particular place表明有人还活着的动静，或表明某处有人的迹象: She listened intently for signs of life.她专注地倾听，寻找生命迹象。 b)something that shows that a situation is becoming more active表明某种情况变得更加活跃的迹象: Commercial property markets are now showing definite signs of life.商业地产市场目前正显现出明显的复苏迹象。9sign of the times something that shows how people live now反映当今人们生活方式的事物: It’s just a sign of the times that many children have mobile phones.很多孩子拥有手机，这不过是时代的写照。10the sign of the Cross the hand movement that some Christians make in the shape of a cross, to show respect for God or to protect themselves from evil一些基督徒用手比画十字形的动作，以示对上帝的敬畏或用以驱邪辟恶COLLOCATIONS词语搭配– Meaning 2– 释义 2ADJECTIVES/NOUN + sign形容词/名词 + signa clear/obvious/unmistakable sign· There are clear signs of a slowdown in economic growth.· 经济增长放缓的迹象已十分明显。a sure sign (=a very clear sign)· He was walking up and down, a sure sign that he was worried.· 他来回踱步，这是他感到忧虑的确切信号。a good/positive/encouraging/hopeful sign· If she can move her legs, that’s a good sign.· 如果她能动腿，那是个好兆头。a bad/ominous sign· The jury was taking ages to make up its mind, which he felt was probably a bad sign.· 陪审团迟迟不能做出裁决，他觉得这大概是个不好的兆头。an outward/visible sign (=one that people can see clearly)· Kim received the news without showing any visible sign of emotion.· 金姆接到这个消息时，没有表现出任何明显的情绪。a warning sign (=one that shows something bad might be happening)· In this case, social workers missed the warning signs and failed to protect the children.· 在这个案例中，社会工作者忽视了警示信号，未能保护这些孩子。a telltale/tell-tale sign (=signs that clearly show something bad)· She would not look at me directly, a tell-tale sign that she was embarrassed.· 她不肯直视我，这正是她感到窘迫的明显迹象。the first sign of something (=the first thing that shows something is happening, or something exists)· They ran off at the first sign of trouble.· 他们一有麻烦的苗头就跑掉了。an early sign (=a sign near the beginning of something that shows that it is happening, or that it exists)· an early sign of spring· 春天来临的早期迹象verbs动词there are signs· There are now signs of an improvement in the economy.· 经济出现好转迹象。have signs· It had all the signs of a crime of passion.· 这件事具有激情犯罪的一切迹象。show signs of something· Did she show any signs of distress?· 她表现出任何痛苦的迹象吗？bear signs of something (=have signs)· The bed was neatly made and bore no signs of having been slept in.· 床铺叠得整整齐齐，没有任何有人睡过的迹象。see/detect signs of something· I could see some signs of improvement in her health.· 我能看出她的健康状况有所改善的迹象。THESAURUS同义词辨析sign [countable] an event, fact etc that shows that something is happening or that something is true or exists表明某事正在发生、某事属实或存在的事件、事实等: · The curtains were still drawn and there was no sign of activity.· 窗帘仍然拉着，毫无动静。· A score of 80 or more is a sign that you are doing very well.· 得分在80分或以上，表明你表现非常出色。indication [countable] a sign. Indication is more formal than sign迹象。Indication 比 sign 更正式: · Recently there have been several indications of improving relations.· 最近有若干迹象表明双边关系正在改善。· There was no indication the killings were related to the drug trade.· 没有迹象表明这些杀人案与毒品交易有关。evidence [uncountable] facts or signs that show clearly that something exists or is true, especially something that you are trying to prove清楚表明某事存在或属实的事实或迹象，尤指人们试图证明的事情: · Scientists are hoping to find evidence that there was once life on Mars.· 科学家希望找到火星上曾经存在生命的证据。· There was not enough evidence to convict him of the murder.· 没有足够的证据判定他犯有谋杀罪。symptom [countable] a sign that someone has an illness or that a serious problem exists表明某人患病或存在严重问题的迹象: · The first symptoms are tiredness and loss of weight.· 最初的症状是疲倦和体重减轻。· Is this a symptom of the decay of Western civilization?· 这是西方文明衰败的症兆吗？indicator [countable] a sign that shows you what is happening or what is true – used about a process, or about the state or level of something显示正在发生什么或什么属实的迹象——用于描述某个过程或某事物的状态或程度: · There are a number of indicators of economic slowdown.· 有若干经济放缓的指标。· The tests are considered a good indicator of intelligence.· 这些测验被认为是衡量智力的良好指标。signal [countable] a sign that shows that you should do something, or that you have a particular attitude表明你应当采取某种行动或持有某种态度的信号: · Severe chest pain is a warning signal that cannot be ignored.· 剧烈的胸痛是不能忽视的警告信号。· Legalizing drugs could send the wrong signal to young people.· 将毒品合法化可能会向年轻人发出错误的信号。mark [countable] a sign, especially that you respect or honour someone一种标志，尤指表达对某人尊重或敬意的表示: · People stood in silence as a mark of respect.· 人们肃立默哀，以示敬意。· It was a mark of her popularity that so many colleagues and friends attended the presentation.· 那么多同事和朋友出席了颁奖典礼，这正是她受欢迎程度的体现。
查看全部语言翻译1gives information [countable] a piece of paper, metal, or wood with words or a picture that gives people information, warnings, or instructions由纸张、金属或木材制成，上有文字或图片，向人们传递信息、警告或指示的标牌: a sign on the door门上的标牌 road signs路标 a no smoking sign禁止吸烟标志 Don’t ignore the fog warning signs.不要忽视大雾警告标志。2shows something is true [countable] an event, fact etc that shows that something is happening or that something is true or exists表明某事正在发生、某事属实或存在的事件、事实等 SYN indicationsign of A red morning sky is a sign of an impending storm.早晨天空红霞是暴风雨即将来临的征兆。 Crying is seen as a sign of weakness.哭泣被视为软弱的表现。 A paw print in the dust was a sign that a tiger was close.尘土中的爪印是老虎在附近的迹象。 There are signs that the situation is improving.有迹象表明形势正在好转。 There were no signs of forced entry into the house.没有强行闯入房屋的迹象。3movement or sound [countable] a movement, sound etc that you make in order to tell someone something为向某人传达信息而做出的动作、发出的声音等: the thumbs-up sign (=a sign that you make with your hand to show that something is successful)竖大拇指的手势（＝用手势表示某事成功的信号）give/make a sign Wait until I give the sign.等我发出信号。sign that Bruce made a sign that he was ready to leave.布鲁斯做了个示意，表示他准备好离开了。sign (for somebody) to do something Three short blasts on the whistle was the sign to begin.三声短促的哨声是开始的信号。4symbol [countable] a mark or shape that has a particular meaning具有特定含义的标记或符号 SYN symbol: the dollar sign美元符号 a minus sign减号5star sign [countable] (also star sign) a group of stars, representing one of 12 parts of the year, that some people believe influences your behaviour and your life代表一年十二个时段之一的星座，有些人相信它会影响人的行为和命运: What sign are you?你是什么星座的？6language [uncountable] a language that uses hand movements instead of spoken words, used by people who cannot hear用手势代替口头语言的语言，供听障人士使用 SYN sign language7there is no sign of somebody/something used to say that someone or something is not in a place or cannot be found用于表示某人或某物不在某处或无法找到: I waited for two hours but there was still no sign of her.我等了两个小时，但她仍然踪影全无。8sign of life a)a movement that shows that someone is alive, or something that shows that there are people in a particular place表明有人还活着的动静，或表明某处有人的迹象: She listened intently for signs of life.她专注地倾听，寻找生命迹象。 b)something that shows that a situation is becoming more active表明某种情况变得更加活跃的迹象: Commercial property markets are now showing definite signs of life.商业地产市场目前正显现出明显的复苏迹象。9sign of the times something that shows how people live now反映当今人们生活方式的事物: It’s just a sign of the times that many children have mobile phones.很多孩子拥有手机，这不过是时代的写照。10the sign of the Cross the hand movement that some Christians make in the shape of a cross, to show respect for God or to protect themselves from evil一些基督徒用手比画十字形的动作，以示对上帝的敬畏或用以驱邪辟恶COLLOCATIONS词语搭配– Meaning 2– 释义 2ADJECTIVES/NOUN + sign形容词/名词 + signa clear/obvious/unmistakable sign· There are clear signs of a slowdown in economic growth.· 经济增长放缓的迹象已十分明显。a sure sign (=a very clear sign)· He was walking up and down, a sure sign that he was worried.· 他来回踱步，这是他感到忧虑的确切信号。a good/positive/encouraging/hopeful sign· If she can move her legs, that’s a good sign.· 如果她能动腿，那是个好兆头。a bad/ominous sign· The jury was taking ages to make up its mind, which he felt was probably a bad sign.· 陪审团迟迟不能做出裁决，他觉得这大概是个不好的兆头。an outward/visible sign (=one that people can see clearly)· Kim received the news without showing any visible sign of emotion.· 金姆接到这个消息时，没有表现出任何明显的情绪。a warning sign (=one that shows something bad might be happening)· In this case, social workers missed the warning signs and failed to protect the children.· 在这个案例中，社会工作者忽视了警示信号，未能保护这些孩子。a telltale/tell-tale sign (=signs that clearly show something bad)· She would not look at me directly, a tell-tale sign that she was embarrassed.· 她不肯直视我，这正是她感到窘迫的明显迹象。the first sign of something (=the first thing that shows something is happening, or something exists)· They ran off at the first sign of trouble.· 他们一有麻烦的苗头就跑掉了。an early sign (=a sign near the beginning of something that shows that it is happening, or that it exists)· an early sign of spring· 春天来临的早期迹象verbs动词there are signs· There are now signs of an improvement in the economy.· 经济出现好转迹象。have signs· It had all the signs of a crime of passion.· 这件事具有激情犯罪的一切迹象。show signs of something· Did she show any signs of distress?· 她表现出任何痛苦的迹象吗？bear signs of something (=have signs)· The bed was neatly made and bore no signs of having been slept in.· 床铺叠得整整齐齐，没有任何有人睡过的迹象。see/detect signs of something· I could see some signs of improvement in her health.· 我能看出她的健康状况有所改善的迹象。THESAURUS同义词辨析sign [countable] an event, fact etc that shows that something is happening or that something is true or exists表明某事正在发生、某事属实或存在的事件、事实等: · The curtains were still drawn and there was no sign of activity.· 窗帘仍然拉着，毫无动静。· A score of 80 or more is a sign that you are doing very well.· 得分在80分或以上，表明你表现非常出色。indication [countable] a sign. Indication is more formal than sign迹象。Indication 比 sign 更正式: · Recently there have been several indications of improving relations.· 最近有若干迹象表明双边关系正在改善。· There was no indication the killings were related to the drug trade.· 没有迹象表明这些杀人案与毒品交易有关。evidence [uncountable] facts or signs that show clearly that something exists or is true, especially something that you are trying to prove清楚表明某事存在或属实的事实或迹象，尤指人们试图证明的事情: · Scientists are hoping to find evidence that there was once life on Mars.· 科学家希望找到火星上曾经存在生命的证据。· There was not enough evidence to convict him of the murder.· 没有足够的证据判定他犯有谋杀罪。symptom [countable] a sign that someone has an illness or that a serious problem exists表明某人患病或存在严重问题的迹象: · The first symptoms are tiredness and loss of weight.· 最初的症状是疲倦和体重减轻。· Is this a symptom of the decay of Western civilization?· 这是西方文明衰败的症兆吗？indicator [countable] a sign that shows you what is happening or what is true – used about a process, or about the state or level of something显示正在发生什么或什么属实的迹象——用于描述某个过程或某事物的状态或程度: · There are a number of indicators of economic slowdown.· 有若干经济放缓的指标。· The tests are considered a good indicator of intelligence.· 这些测验被认为是衡量智力的良好指标。signal [countable] a sign that shows that you should do something, or that you have a particular attitude表明你应当采取某种行动或持有某种态度的信号: · Severe chest pain is a warning signal that cannot be ignored.· 剧烈的胸痛是不能忽视的警告信号。· Legalizing drugs could send the wrong signal to young people.· 将毒品合法化可能会向年轻人发出错误的信号。mark [countable] a sign, especially that you respect or honour someone一种标志，尤指表达对某人尊重或敬意的表示: · People stood in silence as a mark of respect.· 人们肃立默哀，以示敬意。· It was a mark of her popularity that so many colleagues and friends attended the presentation.· 那么多同事和朋友出席了颁奖典礼，这正是她受欢迎程度的体现。signsign2 verb 1name [intransitive, transitive] to write your signature on something to show that you wrote it, agree with it, or were present在某物上写下签名，以表明你是作者、表示同意或证明出席: Sign here, please.请在这里签名。 The artist had signed his name in the corner of the painting.这位艺术家在画作的一角签上了自己的名字。 You forgot to sign the cheque.你忘了在支票上签名。 Over a hundred people have signed the petition.已有一百多人在请愿书上签名。 Serena signs her autograph every time she’s asked.塞雷娜每次被要求签名时都会签。 a signed photo of Paul McCartney保罗·麦卡特尼的亲笔签名照► see thesaurus at write2sign an agreement/contract/treaty etc to make a document, agreement etc official and legal by writing your signature on it通过签署使文件、协议等具有法律效力: France has just signed a new trade deal with Japan.法国刚与日本签署了一项新贸易协议。3music/sport [intransitive, transitive] if a football team or music company signs someone, or if someone signs for them, that person signs a contract in which they agree to work for them如果足球队或唱片公司签下某人，或某人与其签约，即该人签订合同同意为其效力: CBS Records had signed her back in 1988 on a three-album contract.CBS唱片公司早在1988年就与她签订了三张专辑的合约。sign for/to/with Miller worked in the shipyards before signing for Rangers.米勒在加盟流浪者队之前曾在造船厂工作。 Before long, they had signed with Virgin.不久后，他们便与维京唱片签约了。4sign on the dotted line informal非正式 to officially agree to something by signing a contract通过签订合同正式同意某事: Make sure the repairs are done before you sign on the dotted line.在你正式签字之前，确保维修工作已经完成。5sign a bill/legislation/agreement into law if someone in authority signs something into law, they make it part of the law by signing an official document如果权威人士将某事签署入法，即通过签署正式文件使其成为法律的一部分6(all) signed and sealed (also (all) signed, sealed, and delivered) with all the necessary legal documents signed在所有必要的法律文件均已签署的情况下: It’ll all be signed and sealed by Friday, and you can move in then.一切将在周五前完成签署盖章，届时你就可以入住了。7use movements [intransitive] to try to tell someone something or ask them to do something by using signs and movements用手势和动作向某人传达信息或请求对方做某事 SYN signalsign to somebody to do something He signed to the maid to leave the room.他示意女仆离开房间。sign for somebody to do something She signed for us to go inside.她示意我们进去。8language [intransitive, transitive] to use, or translate something into, sign language使用手语，或将某内容翻译成手语—signer noun [countable]sign something ↔ away phrasal verb to sign a document that gives your property or legal rights to someone else签署文件，将财产或法律权利转让给他人: She had signed away all claims to the house.她已签署文件，放弃了对该房屋的一切权利主张。 I felt as if I was signing away my life.我感觉就像是在把自己的一生拱手相让。sign for something phrasal verb to sign a document to prove that you have received something签署文件以证明你已收到某物: This is a registered letter – someone will have to sign for it.这是一封挂号信——必须有人签收。sign in phrasal verb1to write your name on a form, in a book etc when you enter a place such as a hotel, office, or club进入酒店、办公室或俱乐部等场所时，在表格或登记簿上写下自己的名字: Remember to sign in at reception.记得在前台签到。2sign somebody ↔ in to write someone else’s name in a book so that they are allowed to enter a club, an office etc在登记簿上代他人签名，使其获准进入俱乐部、办公室等sign off phrasal verb1informal非正式 to end a radio or television programme by saying goodbye通过道别来结束广播或电视节目2to write your final message at the end of an informal letter在非正式信件末尾写下最后的话: It’s getting late, so I’ll sign off now. Love, John.时间不早了，我就此搁笔。爱你的，约翰。3sign somebody off British English if a doctor signs someone off, he or she gives them a note saying that they are ill and not able to work如果医生为某人开具病假证明，即出具说明其患病且无法工作的书面证明: For the last month, she has been signed off sick from work.过去一个月里，她一直持病假条请假。4sign something ↔ off British English, sign off on something American English to show that you approve of a plan or that something is finished by signing an official document通过签署正式文件表明你批准某项计划或某事已完成: Major repainting work now needs to be signed off by a qualified engineer.重大重新涂漆工程现在需要由合格的工程师签字批准。sign on phrasal verb1British English to state officially that you are unemployed by signing a form, so that you can get money from the government通过签署表格正式申报失业状态，以便获得政府救济金2to sign a document to show that you agree to work for someone签署文件，表明你同意为某人工作sign on as He signed on as a soldier in the US army.他签约加入了美国陆军，成为一名士兵。sign on with I’ll probably have to sign on with a nursing agency.我可能不得不在一家护理中介机构登记就业。sign out phrasal verb1to write your name in a book when you leave a place such as a hotel, an office, or a club离开酒店、办公室或俱乐部等场所时，在登记簿上写下自己的名字2sign something ↔ out to write your name on a form or in a book to show that you have taken or borrowed something在表格或登记簿上签名，表明你已取走或借用了某物: Bernstein signed out a company car.伯恩斯坦签字领用了一辆公司用车。3sign somebody ↔ out to write in a book that someone is allowed to leave somewhere such as a school, an office etc在登记簿上写明某人获准离开学校、办公室等场所: Parents must sign pupils out when collecting them for doctor’s or dentist’s appointments.家长接孩子去看病或看牙医时，必须在登记簿上为其签字离校。sign something ↔ over phrasal verb to sign an official document that gives your property or legal rights to someone else签署正式文件，将财产或法律权利转让给他人sign over to When he became ill, he signed his property in France over to his son.他生病后，将自己在法国的财产签字转让给了儿子。sign up phrasal verb1to put your name on a list for something because you want to take part in it在名单上签名报名，表明你希望参加某活动sign up for I’m thinking of signing up for a yoga course.我在考虑报名参加一门瑜伽课程。sign up to do something Over half the people who signed up to do engineering were women.报名学习工程专业的学生中，超过一半是女性。2 sign somebody ↔ up if someone is signed up by an organization, they sign a contract in which they agree to work for that organization如果某人被一个组织签下，即该人签订合同，同意为该组织工作: Several well-known researchers have been signed up for the project.数位知名研究人员已被签约参与该项目。
1name [intransitive, transitive] to write your signature on something to show that you wrote it, agree with it, or were present在某物上写下签名，以表明你是作者、表示同意或证明出席: Sign here, please.请在这里签名。 The artist had signed his name in the corner of the painting.这位艺术家在画作的一角签上了自己的名字。 You forgot to sign the cheque.你忘了在支票上签名。 Over a hundred people have signed the petition.已有一百多人在请愿书上签名。 Serena signs her autograph every time she’s asked.塞雷娜每次被要求签名时都会签。 a signed photo of Paul McCartney保罗·麦卡特尼的亲笔签名照► see thesaurus at write2sign an agreement/contract/treaty etc to make a document, agreement etc official and legal by writing your signature on it通过签署使文件、协议等具有法律效力: France has just signed a new trade deal with Japan.法国刚与日本签署了一项新贸易协议。3music/sport [intransitive, transitive] if a football team or music company signs someone, or if someone signs for them, that person signs a contract in which they agree to work for them如果足球队或唱片公司签下某人，或某人与其签约，即该人签订合同同意为其效力: CBS Records had signed her back in 1988 on a three-album contract.CBS唱片公司早在1988年就与她签订了三张专辑的合约。sign for/to/with Miller worked in the shipyards before signing for Rangers.米勒在加盟流浪者队之前曾在造船厂工作。 Before long, they had signed with Virgin.不久后，他们便与维京唱片签约了。4sign on the dotted line informal非正式 to officially agree to something by signing a contract通过签订合同正式同意某事: Make sure the repairs are done before you sign on the dotted line.在你正式签字之前，确保维修工作已经完成。5sign a bill/legislation/agreement into law if someone in authority signs something into law, they make it part of the law by signing an official document如果权威人士将某事签署入法，即通过签署正式文件使其成为法律的一部分6(all) signed and sealed (also (all) signed, sealed, and delivered) with all the necessary legal documents signed在所有必要的法律文件均已签署的情况下: It’ll all be signed and sealed by Friday, and you can move in then.一切将在周五前完成签署盖章，届时你就可以入住了。7use movements [intransitive] to try to tell someone something or ask them to do something by using signs and movements用手势和动作向某人传达信息或请求对方做某事 SYN signalsign to somebody to do something He signed to the maid to leave the room.他示意女仆离开房间。sign for somebody to do something She signed for us to go inside.她示意我们进去。8language [intransitive, transitive] to use, or translate something into, sign language使用手语，或将某内容翻译成手语—signer noun [countable]sign something ↔ away phrasal verb to sign a document that gives your property or legal rights to someone else签署文件，将财产或法律权利转让给他人: She had signed away all claims to the house.她已签署文件，放弃了对该房屋的一切权利主张。 I felt as if I was signing away my life.我感觉就像是在把自己的一生拱手相让。sign for something phrasal verb to sign a document to prove that you have received something签署文件以证明你已收到某物: This is a registered letter – someone will have to sign for it.这是一封挂号信——必须有人签收。sign in phrasal verb1to write your name on a form, in a book etc when you enter a place such as a hotel, office, or club进入酒店、办公室或俱乐部等场所时，在表格或登记簿上写下自己的名字: Remember to sign in at reception.记得在前台签到。2sign somebody ↔ in to write someone else’s name in a book so that they are allowed to enter a club, an office etc在登记簿上代他人签名，使其获准进入俱乐部、办公室等sign off phrasal verb1informal非正式 to end a radio or television programme by saying goodbye通过道别来结束广播或电视节目2to write your final message at the end of an informal letter在非正式信件末尾写下最后的话: It’s getting late, so I’ll sign off now. Love, John.时间不早了，我就此搁笔。爱你的，约翰。3sign somebody off British English if a doctor signs someone off, he or she gives them a note saying that they are ill and not able to work如果医生为某人开具病假证明，即出具说明其患病且无法工作的书面证明: For the last month, she has been signed off sick from work.过去一个月里，她一直持病假条请假。4sign something ↔ off British English, sign off on something American English to show that you approve of a plan or that something is finished by signing an official document通过签署正式文件表明你批准某项计划或某事已完成: Major repainting work now needs to be signed off by a qualified engineer.重大重新涂漆工程现在需要由合格的工程师签字批准。sign on phrasal verb1British English to state officially that you are unemployed by signing a form, so that you can get money from the government通过签署表格正式申报失业状态，以便获得政府救济金2to sign a document to show that you agree to work for someone签署文件，表明你同意为某人工作sign on as He signed on as a soldier in the US army.他签约加入了美国陆军，成为一名士兵。sign on with I’ll probably have to sign on with a nursing agency.我可能不得不在一家护理中介机构登记就业。sign out phrasal verb1to write your name in a book when you leave a place such as a hotel, an office, or a club离开酒店、办公室或俱乐部等场所时，在登记簿上写下自己的名字2sign something ↔ out to write your name on a form or in a book to show that you have taken or borrowed something在表格或登记簿上签名，表明你已取走或借用了某物: Bernstein signed out a company car.伯恩斯坦签字领用了一辆公司用车。3sign somebody ↔ out to write in a book that someone is allowed to leave somewhere such as a school, an office etc在登记簿上写明某人获准离开学校、办公室等场所: Parents must sign pupils out when collecting them for doctor’s or dentist’s appointments.家长接孩子去看病或看牙医时，必须在登记簿上为其签字离校。sign something ↔ over phrasal verb to sign an official document that gives your property or legal rights to someone else签署正式文件，将财产或法律权利转让给他人sign over to When he became ill, he signed his property in France over to his son.他生病后，将自己在法国的财产签字转让给了儿子。sign up phrasal verb1to put your name on a list for something because you want to take part in it在名单上签名报名，表明你希望参加某活动sign up for I’m thinking of signing up for a yoga course.我在考虑报名参加一门瑜伽课程。sign up to do something Over half the people who signed up to do engineering were women.报名学习工程专业的学生中，超过一半是女性。2 sign somebody ↔ up if someone is signed up by an organization, they sign a contract in which they agree to work for that organization如果某人被一个组织签下，即该人签订合同，同意为该组织工作: Several well-known researchers have been signed up for the project.数位知名研究人员已被签约参与该项目。