It is necessary to put up a fight against waste.

有必要开展一次反浪费斗争。

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To learn new things, to continue to progress, it is necessary to put their own posture.

要学会新东西，要不断进步，就必须放低自己的姿势。

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Also, as the CA runs a high risk, it is necessary to put a reasonable limitation on its liability.

又因为认证机构的高风险性，故还应对其责任进行合理限制。

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Probably the best answer is our body is worn out during the day and sleep is necessary to put it back into shape.

最佳的答案应该是,一天下来，我们的身体已经疲惫了,有必要进行睡眠，以恢复状态。

耶鲁公开课 - 心理学导论课程节选

There is a necessary and inevitable tension between philosophy and belief or to put it another way between philosophy and the civic pieties that hold the city together.

所以紧张关系必然,且无可避免地存在于哲学与信念之间,或换句话说,介于哲学与维系全城的公民虔诚间。

耶鲁公开课 - 政治哲学导论课程节选

In order to get people to farm, thus providing local food (you know, local is good, right?), in a place which is snow and ice for half the year it is necessary to put up huge trade barriers to food coming in from places with more grass and more cows.

FORBES: The Great Norwegian Butter Famine

"I call on Congress today to act immediately to appropriate whatever is necessary to put armed police officers in every single school in this nation and to do it now to make sure that blanket safety is in place when our kids return to school in January, " he said.

CNN: NRA clarifies its stance on arming schools

But even with foreign involvement, and even if a bankable electricity sales contract with Thailand is put in place, it would still be almost impossible for Laos to raise the necessary money.

ECONOMIST: Laos