| 单词 | necessary |
| 释义 | necessary adjectiveverbs | adverb | preposition | phrases verbs➤appear, be, prove, seem显得必要；必要；证明必要；看似必要▸➤become变得必要▸➤remain仍然必要▸➤make sth使⋯成为必要◆the cold weather has made it necessary to protect the crops.天气寒冷，庄稼必须加以保护。➤believe sth, consider sth, deem sth, feel sth, find sth, regard sth as, see sth as, think sth相信⋯必要；认为⋯必要；视⋯为必要；感觉⋯必要；发现⋯很必要◆make any alterations you consider necessary.你认为有必要的都可以修改。◆you may find it necessary to readjust the wheels from time to time.你可能会发现不时调整轮子很有必要。adverb➤really, strictly确实／完全必要◆i was determined not to stay in the hospital for any longer than was strictly necessary.我决定，除非极为必要，否则决不在医院多待一天。➤absolutely绝对必要➤hardly几乎无需▸➤logically逻辑上必要▸➤medically医学上必要preposition➤for对⋯必要◆qualifications which are necessary for work with the under-fives照顾 5 岁以下儿童必需的资格phrases➤if necessary如果必要的话◆these measures will be enforced, if necessary, by the army.如果必要，军队会强制执行这些措施。➤as necessary, when necessary, where necessary需要时；必要处◆we are here to give help and support when necessary.如有需要，我们随时提供帮助和支援。◆editorial changes have been made where necessary.在必要之处作了编辑上的改动。 necessary adjective ➡ see also the entry for essential另见 essential 条necessary ♦︎ compulsory ♦︎ mandatory ♦︎ requisite ♦︎ obligatory ♦︎ forced ♦︎ involuntarythese words all describe sth that sb has to do or have.这些词均表示必须做的、必要的、强制性的。patterns and collocations 句型和搭配◆it's necessary / compulsory / mandatory / obligatory for sb to do sth◆it's necessary / compulsory / mandatory / obligatory to do sth◆forced / involuntary repatriation◆almost / legally compulsory / obligatory■ necessary that is needed for a purpose or a reason必需的；必要的◆it may be necessary to buy a new one.也许有必要买个新的了。◆only use your car when absolutely necessary.不得已时才开车。◆if necessary, you can contact me at home.必要的话，我在家时你也可以和我联系。◆i'll make the necessary arrangements.我会做一些必要的安排。opp unnecessary → unnecessary ➡ see also necessary → inevitable , necessitate → mean verb 3 ■ compulsory /kəmpʌlsəri/ (rather formal) that must be done because of a law or rule（按法律或规定）必须做的，强制的◆it is compulsory for all motorcyclists to wear helmets.所有骑摩托车的人都必须强制戴头盔。◆english is a compulsory subject at this level.英语在这一级别是必修科目。opp voluntary , optional → voluntary 1 ➡ see also compulsion → pressure 2 ■ mandatory /mændətəri; name mændətɔːri, bre also mændeɪtəri/ (formal) that must be done because of a law（按法律）必须做的，强制的◆it is mandatory for blood banks to test all donated blood for the virus.血库一律要按规定检查所有捐献的血液是否含有这种病毒。◆the offence carries a mandatory life sentence.这种罪行依照法律要判无期徒刑。■ requisite /rekwɪzɪt/ [only before noun] (formal) necessary for a particular purpose必需的；必备的；必不可少的◆she lacks the requisite experience for the job.她缺少做这份工作所必需的经验。■ obligatory /əblɪgətri; name əblɪgətɔːri/ (formal) that must be done because of a law or rule（按法律或规定）必须做的，强制的◆it is obligatory for all employees to wear protective clothing.所有员工必须强制穿防护服。ⓘ obligatory is sometimes used humorously before a noun to talk about sth that often exists or is done, but that is not really necessary at all. * obligatory 有时用于名词前，描述常有的或常做的但根本无甚必要的事，为幽默用法◆the hotel has a terrace with comfy chairs for that obligatory cocktail.这家旅馆有个露台，摆放着舒适的椅子，供人们喝上一杯那似乎是不可或缺的鸡尾酒。 opp optional → voluntary 1 note 辨析 compulsory, mandatory or obligatory? compulsory is used especially in the contexts of education, business and employment. * compulsory 尤用于教育、商务和职业语境◆compulsory education / schooling / reading / subjects义务教育；必读材料；必修科目◆compulsory insurance / liquidation / purchase / redundancy / retirement强制性保险；强制清算／购买／裁员／退休 mandatory is used especially in the context of the law. * mandatory 尤用于法律语境◆a mandatory sentence / penalty / duty / requirement法定判决；依法惩处；法定义务／条件 obligatory is often used to talk about rules and laws relating to safety, for example in sport or the workplace. * obligatory 常用于描述跟安全相关的规定和法律，如体育运动的规则或工作场所的规章◆recently safety regulations have made it obligatory for all competitors to wear fist protectors.最近，所有参赛者都必须按安全规定戴拳套护具。■ forced [usually before noun] happening or done without you wanting it to被迫的；不得已的；非自愿的◆many are unhappy about the forced repatriation of the refugees.很多人对强制遣返难民感到不满。◆i hope there will be no need for the forced sale of any property.我希望不会有强行变卖财产的必要。■ involuntary /ɪnvɒləntri; name ɪnvɑːlənteri/ [usually before noun] (rather formal, written) happening or done without you wanting it to被迫的；不得已的；非自愿的◆the distinction between voluntary and involuntary unemployment is often blurred.自愿失业和非自愿失业之间的区分往往很模糊。opp voluntary → voluntary 1 note 辨析 forced or involuntary? forced often suggests that sb is forcing sb to do sth; involuntary suggests that it is circumstances, not another person, that forces sb to do or be sth. * forced 常指受他人所迫，involuntary 指受环境所迫或所限◆forced unemployment however, involuntary can also be used when it is in fact the actions or decision of another person that forces sb to do sth, as a more formal and less direct (or less honest) way of saying forced.不过，involuntary 可用于指事实上是另一个人的行为或决定迫使某人做某事，是 forced 较为正式和不太直接（或不太坦率）的说法◆the forced / involuntary repatriation of the refugees对难民的强制性遣返necessary [only before noun] (rather formal, written) that must exist or happen and cannot be avoided必然的；无法避免的◆a necessary condition for a steep fall in demand is a widespread collapse in confidence.要使需求陡降，一个必要条件是人们普遍丧失信心。◆this is a necessary consequence of progress.这是发展的必然后果。ⓘ in this meaning necessary is used especially to describe the conditions or prerequisites that must exist before a particular thing can happen; or the results, outcome or consequence that must happen in a particular situation or after a particular event.表达此义时，necessary 多与 condition 或 prerequisite 连用，表示某事得以发生的条件；或者与 result、outcome 或 consequence 连用，表示在特定情况下或某一事件后必然发生的结果。 ➡ see also necessary → necessary ▸ necessarily adverb◆the number of places available is necessarily limited.能提供的职位必定有限。necessarythat is needed for a purpose or a reason必需的；必要的◆it may be necessary to buy a new one.也许有必要买个新的了。◆only use your car when absolutely necessary.不得已时才开车。◆if necessary, you can contact me at home.必要的话，我在家时你也可以和我联系。◆i'll make the necessary arrangements.我会做一些必要的安排。opp unnecessary → unnecessary ➡ see also necessary → inevitable , necessitate → mean verb 3 necessary/ˈnesəsəri; us -serɪ ||; ˈnɛsəˌsɛrɪ/adj necessary (for sb/sth) (to do sth) that is needed for a purpose or a reason 必需的；必要的: ◇a good diet is necessary for a healthy life. 良好的饮食习惯对健康的生活是必需的。◇it's not necessary for you all to come. 你们不必全都来。◇if necessary i can take you to work that day. 必要的话，那天我可以送你去上班。 [opp] unnecessary 反义词为unnecessary☞ need/necessary ne·ces·sa·ry /`nɛsəˏsɛrɪ; ˈnesɪsəri/adjif something is necessary, you need it in order to have something or do something 必要的，必需的，必须的:◇"should i bring my passport?" "no, that won't be necessary." “我应该带护照吗？”“不用，那没有必要。”◇will you make all the necessary arrangements? 你来做这一切必要的安排好吗？◇the doctor says it may be necessary for me to have an operation. 医生说我或许有必要做手术。◇if necessary they say they'll use force if necessary. 他们说必要时会使用武力。◇a necessary evil (=something bad or unpleasant that you have to accept because it is necessary) 难免的坏事: paying taxes is seen as a necessary evil. 缴税被看作是不得已的事情。 ☞ necessary |
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