necessary 的英语意思
necessarynecessary1 /ˈnesəsəri $ -seri/ adjective 
查看全部语言翻译1something that is necessary is what you need to have or need to do必要的事物是指你需要拥有或需要做的: 
The booklet provides all the necessary information about the college.该小册子提供了有关这所大学的所有必要信息。 No further changes were considered necessary.没有进一步的变更被认为有必要。absolutely/really necessary The police are advising motorists to travel only if their journey is absolutely necessary.警方建议驾驶人，除非行程绝对必要，否则不要出行。it is necessary (for somebody) to do something It’s not necessary to wear a tie.不必系领带。 The doctor says it may be necessary for me to have an operation.医生说我可能有必要接受手术。make it necessary (for somebody) to do something Falling profits made it necessary to restructure the business.利润下滑使得重组企业成为必要。necessary for (doing) something A good diet is necessary for maintaining a healthy body.良好的饮食对于保持健康的身体是必要的。if/when/where necessary I’ll stay up all night, if necessary, to get it finished.如有必要，我会整夜不睡来完成它。Register语体In everyday English, instead of saying it is necessary for somebody to do something, people usually say that someone has to do something: The doctor says it might be necessary for me to have an operation. ➔ The doctor says I might have to have an operation.在日常英语中，人们通常不说 it is necessary for somebody to do something，而是说 someone has to do something：The doctor says it might be necessary for me to have an operation. ➔ The doctor says I might have to have an operation.2necessary connection/consequence etc a connection, result etc that must exist and cannot be avoided必然存在且无法避免的联系、结果等: The closure of the factory was a necessary consequence of increased competition from abroad.工厂关闭是来自海外竞争加剧的必然结果。3a necessary evil something bad or unpleasant that you have to accept in order to achieve what you want为了达到目的不得不接受的坏事或令人不快的事: Mr Hurst regarded work as a necessary evil.赫斯特先生把工作视为必要之恶。THESAURUS同义词辨析necessary used to describe something that you need to have or do用于描述你需要拥有或需要做的事物: · Make sure you bring the necessary documents with you.· 务必随身携带所需文件。· It may be necessary for you to have a small operation.· 你可能需要接受一次小手术。essential very important and necessary, especially in order to be healthy, successful etc非常重要且必不可少的，尤指为了保持健康、取得成功等: · Vitamins are essential for healthy growth.· 维生素对健康生长至关重要。· The tourist industry is an essential part of the Spanish economy.· 旅游业是西班牙经济的重要组成部分。vital extremely important and necessary, especially in order to avoid serious problems极其重要且必要的，尤指为了避免严重问题: · A vital piece of equipment on the spacecraft had stopped operating.· 航天器上一件至关重要的设备已停止运作。· It is vital that the aid is sent immediately.· 立即发送援助至关重要。compulsory if something is compulsory, you must do it because of a rule or law若某事物是 compulsory，则你必须依据规定或法律去执行: · Maths and Science are compulsory subjects.· 数学和科学是必修科目。· All new staff undergo a compulsory training course.· 所有新员工都须参加强制性培训课程。obligatory if something is obligatory, you must do it because of a rule or law. Obligatory is more formal than compulsory若某事物是 obligatory，则你必须依据规定或法律去执行。obligatory 比 compulsory 更为正式: · The use of seatbelts is obligatory.· 系安全带是强制性规定。· Safety regulations have made it obligatory for all competitors to wear fist protectors.· 安全规定要求所有参赛者必须佩戴护拳。mandatory if something is mandatory, you must do it because it is the law. Mandatory is more formal than compulsory and sounds stronger若某事物是 mandatory，则你必须依法执行。mandatory 比 compulsory 更为正式，语气也更强: · School attendance is mandatory.· 上学就读是强制性规定。· a prisoner serving a mandatory life sentence· 服强制性无期徒刑的囚犯requisite /ˈrekwəzət/ formal正式 [usually before noun] the requisite things are the ones that you need to have in order to do somethingrequisite 的事物是指你为完成某事而必须具备的东西: · The other candidates lacked the requisite skills.· 其他候选人缺乏所需技能。· the requisite evidence needed for a successful prosecution· 成功起诉所需的必要证据
查看全部语言翻译1something that is necessary is what you need to have or need to do必要的事物是指你需要拥有或需要做的: The booklet provides all the necessary information about the college.该小册子提供了有关这所大学的所有必要信息。 No further changes were considered necessary.没有进一步的变更被认为有必要。absolutely/really necessary The police are advising motorists to travel only if their journey is absolutely necessary.警方建议驾驶人，除非行程绝对必要，否则不要出行。it is necessary (for somebody) to do something It’s not necessary to wear a tie.不必系领带。 The doctor says it may be necessary for me to have an operation.医生说我可能有必要接受手术。make it necessary (for somebody) to do something Falling profits made it necessary to restructure the business.利润下滑使得重组企业成为必要。necessary for (doing) something A good diet is necessary for maintaining a healthy body.良好的饮食对于保持健康的身体是必要的。if/when/where necessary I’ll stay up all night, if necessary, to get it finished.如有必要，我会整夜不睡来完成它。Register语体In everyday English, instead of saying it is necessary for somebody to do something, people usually say that someone has to do something: The doctor says it might be necessary for me to have an operation. ➔ The doctor says I might have to have an operation.在日常英语中，人们通常不说 it is necessary for somebody to do something，而是说 someone has to do something：The doctor says it might be necessary for me to have an operation. ➔ The doctor says I might have to have an operation.2necessary connection/consequence etc a connection, result etc that must exist and cannot be avoided必然存在且无法避免的联系、结果等: The closure of the factory was a necessary consequence of increased competition from abroad.工厂关闭是来自海外竞争加剧的必然结果。3a necessary evil something bad or unpleasant that you have to accept in order to achieve what you want为了达到目的不得不接受的坏事或令人不快的事: Mr Hurst regarded work as a necessary evil.赫斯特先生把工作视为必要之恶。THESAURUS同义词辨析necessary used to describe something that you need to have or do用于描述你需要拥有或需要做的事物: · Make sure you bring the necessary documents with you.· 务必随身携带所需文件。· It may be necessary for you to have a small operation.· 你可能需要接受一次小手术。essential very important and necessary, especially in order to be healthy, successful etc非常重要且必不可少的，尤指为了保持健康、取得成功等: · Vitamins are essential for healthy growth.· 维生素对健康生长至关重要。· The tourist industry is an essential part of the Spanish economy.· 旅游业是西班牙经济的重要组成部分。vital extremely important and necessary, especially in order to avoid serious problems极其重要且必要的，尤指为了避免严重问题: · A vital piece of equipment on the spacecraft had stopped operating.· 航天器上一件至关重要的设备已停止运作。· It is vital that the aid is sent immediately.· 立即发送援助至关重要。compulsory if something is compulsory, you must do it because of a rule or law若某事物是 compulsory，则你必须依据规定或法律去执行: · Maths and Science are compulsory subjects.· 数学和科学是必修科目。· All new staff undergo a compulsory training course.· 所有新员工都须参加强制性培训课程。obligatory if something is obligatory, you must do it because of a rule or law. Obligatory is more formal than compulsory若某事物是 obligatory，则你必须依据规定或法律去执行。obligatory 比 compulsory 更为正式: · The use of seatbelts is obligatory.· 系安全带是强制性规定。· Safety regulations have made it obligatory for all competitors to wear fist protectors.· 安全规定要求所有参赛者必须佩戴护拳。mandatory if something is mandatory, you must do it because it is the law. Mandatory is more formal than compulsory and sounds stronger若某事物是 mandatory，则你必须依法执行。mandatory 比 compulsory 更为正式，语气也更强: · School attendance is mandatory.· 上学就读是强制性规定。· a prisoner serving a mandatory life sentence· 服强制性无期徒刑的囚犯requisite /ˈrekwəzət/ formal正式 [usually before noun] the requisite things are the ones that you need to have in order to do somethingrequisite 的事物是指你为完成某事而必须具备的东西: · The other candidates lacked the requisite skills.· 其他候选人缺乏所需技能。· the requisite evidence needed for a successful prosecution· 成功起诉所需的必要证据