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VERB
(为做成某事或正常生活)要求有，必须有，需要
If you need something, or need to do something, you cannot successfully achieve what you want or live properly without it.
例句
He desperately needed money...
他迫切需要钱。
These diets provide everything your body needs...
这些饮食提供了你身体需要的所有营养。
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VERB
(表示某一做法对某事物或地方有益)应该，应当，需要
If an object or place needs something doing to it, that action should be done to improve the object or place. If a task needs doing, it should be done to improve a particular situation.
例句
The building needs quite a few repairs.
该建筑有好几处应该修缮。
...a garden that needs tidying...
应该清整的花园
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N-SING
必要;需要
If there is a need for something, that thing would improve a situation or something cannot happen without it.
例句
Mr Forrest believes there is a need for other similar schools throughout Britain...
福里斯特先生认为全英国都需要有类似的学校。
'I think we should see a specialist.' — 'I don't think there's any need for that.'...
“我想我们应该见见专家。”——“我认为没有任何必要。”
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MODAL
不必，没有必要(用于告知或建议)
If you say that someone needn't do something, you are telling them not to do it, or advising or suggesting that they should not do it.
例句
'I'll put the key in the window.' — 'You needn't bother,' he said gruffly...
“我会把钥匙放在窗户里。”——“不必麻烦了，”他粗声说道。
Look, you needn't shout...
嗨，你不必大喊大叫。
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MODAL
(与否定词连用)不必，没有必要
If you tell someone that they needn't do something, or that something needn't happen, you are telling them that that thing is not necessary, in order to make them feel better.
例句
You needn't worry...
你不必担心。
This needn't take long, Simon...
西蒙，这花不了多长时间。
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MODAL
(与否定词连用)准许不做，可以不做
You use needn't when you are giving someone permission not to do something.
例句
You needn't come again, if you don't want to...
如果你不想来，可以不用再来。
Well, you needn't tell me anything if you don't want to.
好吧，如果你不想告诉我，可以什么也不说。
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MODAL
(与否定词连用)未必，不一定
If something need not be true, it is not necessarily true or not always true.
例句
What is right for us need not be right for others...
对我们来说是对的东西，对别人来说未必正确。
Freedom need not mean independence.
自由不一定意味着独立。
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MODAL
(与否定词连用)本来不必，本来不需要
If someone needn't have done something, it was not necessary or useful for them to do it, although they did it.
例句
She could have made the sandwich herself; her mum needn't have bothered to do anything...
她本来可以自己做三明治的;她妈妈原本不必费心做任何事情。
I was a little nervous when I announced my engagement to Grace, but I needn't have worried...
我宣布和格雷丝订婚时有点紧张，但我本不必担心的。
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MODAL
(与否定词连用)无需说，不必说
You use need in expressions such as I need hardly say and I needn't add to emphasize that the person you are talking to already knows what you are going to say.
例句
I needn't add that if you fail to do as I ask, you will suffer the consequences.
如果你没按我的要求做的话，后果请自负——这话我就不必再说了吧。
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MODAL
还需要再说吗;还要我继续说吗
You can use need in expressions such as 'Need I say more' and 'Need I go on' when you want to avoid stating an obvious consequence of something you have just said.
例句
Mid-fifties, short black hair, grey moustache, distinctive Russian accent. Need I go on?
五十四五岁，黑色短发，灰色八字胡，明显的俄国口音，还需要我继续说吗？
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PHRASE
贫困的;困难中的
People in need do not have enough of essential things such as money, food, or good health.
例句
The education authorities have to provide for children in need...
教育主管部门得救助贫困儿童。
Remember that when both of you were in need, I was the one who loaned you money.
记住，在你们两个都有困难的时候，是我借钱给你们的。
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PHRASE
有…的需要;有…的必要
If you are in need of something, you need it or ought to have it.
例句
I was all right but in need of rest...
我没事，就是需要休息一下。
He was badly in need of a shave...
他早就应该刮一下胡子了。
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PHRASE
需要的话;如有必要(英国英语中亦作 if needs be)
If you say that you will do something, especially an extreme action, if need be, you mean that you will do if it is necessary. In British English, you can also say if needs be .
例句
They will now seek permission to take their case to the House of Lords, and, if need be, to the European Court of Human Rights.
他们现在将争取获准将案件呈交上议院审理，并且，如有必要，会上诉到欧洲人权法院。
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PHRASE
没有必要;不必
You can tell someone that there's no need for them to do something as a way of telling them not to do it or of telling them to stop doing it, for example because it is unnecessary.
例句
There's no need to call a doctor...
没有必要叫医生。
There's no need for that kind of language in this magazine...
这份杂志没必要出现那种语言。
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PHRASE
没人需要;没谁需要
You can say 'Who needs something?' as a way of emphasizing that you think that this thing is unnecessary or not useful.
例句
With apologies to my old history teacher, who needs history lessons?...
这话对不住我亲爱的历史老师，不过有谁需要历史课呢？
Cigarettes, who needs them?
香烟，谁会要呀？