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n.需要；必然性；必需品
1、necessitate───vt.使成为必需，需要；迫使
2、necessities───n.必需品（necessity的复数）
3、necessitous───adj.贫困的，贫穷的；紧急的
4、necessitied───必要的
5、of necessity───必然地；不可避免地
6、necessary───adj.必要的；必需的；必然的；n.必需品；n.(Necessary)（英）内塞瑟里（人名）
7、needcessity───需要性
8、nonnecessity───非必要性
9、necessarily───adv.必要地；必定地，必然地
1、If only they would realize above all that an artist works of necessity, that he himself is only an insignificant part of the world.───要是人们能认识到最重要的是一个艺术家的必要的作品，艺术家本人只是世界无关紧要的一部分。
2、Shopping is no longer just a necessity; it has become a form of entertainment.───购物不仅仅是一种需要，它还成为一种娱乐休闲方式。
3、She writes: "Gorbachev and his advisers did not comprehend the chance that had opened up, and the necessity of moving quickly to seize it. "───她写道：“戈尔巴乔夫及其顾问没有理解他们面前出现的机遇，以及迅速行动抓住这个机遇的必要性。”
4、To them, slavery was no longer just a question of right or wrong. It was a necessity for survival.───对于他们而言，拥有奴隶不再是一个对与错的问题，而是生存之所必须。
5、This was done largely out of necessity, as the fiber crops that were previously used for the process were experiencing a shortage.───这样做主要是出于需要，作为纤维作物，以前使用的过程中经历了短缺。
6、Water is a basic necessity of life.───水是一种基本生活必需品。
7、We were discussing the necessity of employing more staff.───我们在讨论是否需要雇用更多员工。
8、There is agreement on the necessity of reforms.───关于改革的必要性有一致意见。
9、As a struggling mom with a high school education, 34-year-old Karen Hoxmeier had always been a bargain hunter . by necessity.───作为一个只有高中学历，在困境中挣扎的母亲，为了生活的必须，34岁的KarenHoxmeier总是购买廉价货。
1、The people in the rural areas use mud bricks only as an immediate, practical necessity.
2、This is, of necessity, a brief and incomplete account.
3、Necessity (or Need) has (or knows) no law.
4、A friend is known in necessity.
5、Necessity knows no law.
6、There is agreement on the necessity of reforms.
7、She saw books as a necessity, not a luxury.
8、Water is a necessity of life.
9、The best teacher one can have is necessity.