n. 1.需要,必要性。 2.〔常 pl.〕 必需品。 3.必然(性)。 4.〔常 pl.〕 贫穷；困难；危急。 短语和例子 physical necessity 必然力,命运。 logical necessity 逻辑的必然。 the doctrine of necessity 宿命论。 N- is the mother of invention. 需要是发明之母。 as a necessity 必然地。 be in dire necessities 穷困极了。 be under the necessity of (doing) 不得已而…；必须做某事。 bow to necessity 服从命运；屈服于需要。 by absolute necessity 万不得已。 from (sheer) necessity 因(十分)需要。 in case of necessity 必要时。 make a virtue of necessity 做非做不可的事而装成出于高尚动机。 of necessity 必然,必定；不得已；不可避免地 (That discussion must of necessity be postponed for a while. 讨论会不得不延期举行)。
anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained" 同义词：essential, requirement, requisite, necessary,
the condition of being essential or indispensable
例句与用法
1.
We are faced with the necessity of buying a new car . 我们必须买一辆新车了。
2.
Necessity is the mother of collection . 需求是收集之母。
3.
My own necessities made me regardless of anything . 我自己的困苦使我不顾一切了。
4.
We would make a virtue of necessity . 我们要把迫不得已而为的事装成出于好心而为。
5.
Necessity is the mother of invention . 需要是发明之母。
6.
They say that necessity is the mother of invention . 人们说，需要是创造发明之母。
7.
Necessity is the mother of invention . 需要乃发明之母。
8.
That discussion must of necessity be postponed for a while . 讨论会不得不延期举行。
9.
In most instances, necessity is the mother of invention . 在绝大数情况下，需要是发明之母。
10.
The french nation as a whole calmly accepted their necessity . 整个法国亦泰然接受他们的命运。
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