necessity
US:/nəˈsesəti/
UK:/nə'sesəti/
n.:
必然性；必要；需要；必需品
网络:
必要性；紧急避险
Word forms: (复数) necessities
Examples
1.
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。
2.
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。
3.
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。
4.
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。”
5.
You see a strong vibration in case of PID control which means necessity of re-adjustment of parameters by engineers at the site.
你会看到一个PID控制在强烈振动情况下，这意味着需要重新调整参数的工程师在现场。
6.
Waste and pollution management: Sources of pollution should be identified and appropriate actions have to be taken in case of necessity .
废物污染管理应签定污染源，必要时采取适当的措施。
7.
Over the decades it has lost its negative connotations and is now taken as a necessity of survival.
经过数十年的变迁，这个词失去了其负面含义，现在它被理解为一种生存的必要。
8.
Perhaps it would be more apt to call it a "bitter necessity for tough times" or simply, "sensible" .
也许把它叫作“困难时期迫不得已的必需措施”还差不多，或者更简单点，“明智之举”。
9.
Her determined approach seems to have grown on a bed of economy, on the necessity to get as much done as she possibly can.
她做事果断似乎是由于经济条件所迫而养成的习惯，不得不尽可能多做些事情。
10.
He began to worry about the necessity of a new connection and to see impending serious financial straits unless something turned up.
他开始为必须再找寻新的关系而发愁，并且开始意识到，除非出现什么转机，否则严重的经济困难已经迫在眉睫。