Respect for life is a cardinal principle of English law.

尊重生命是英国法律最重要的原则。

《牛津词典》

The principle of diligence and frugality applies to all undertakings.

勤俭节约的原则适用于一切事业。

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To learn a language we must follow the principle of gradual improvement.

学习语言必须遵循循序渐进的原则。

《新英汉大辞典》

He was influenced by Thomas Malthus' work, "An Essay on the Principle of Population" written in seventeen ninety-eight.

VOA: special.2009.02.25

So we haven't gotten to molecules yet, we're just talking about single atoms or single ions, but what's nice is just talking about this very straightforward principle of atomic radius.

我们还没有开始讲分子，我们仍然只是在讨论单个原子或离子，但它的好处在于可以讨论,这个关于原子半径的非常简单直接的原理。

麻省理工公开课 - 化学原理课程节选

The problem is that while the principle of risk-sharing is very simple and obvious the practice requires technology.

问题在于,尽管风险分摊原则,听起来浅显易懂,但是实践仍然需要技术支持。

耶鲁公开课 - 金融市场课程节选

"We have to defend the principle of universality and universal access, " he told BBC News.

BBC: Cern re-creating first web page to revere early ideals

Mr MacAskill said he accepted the principle of almost all of the recommendations directed towards government.

BBC: Human trafficking 1

The rationale for all of this is simple, and follows an entropic principle of creativity.

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