Citizens of wealthy nations demand national parks, clean rivers, clean air and poison-free food.

富裕国家的公民要求有国家公园、干净的河流、干净的空气和无毒的食物。

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Ensure that they are clean and place into a fermentation bin. Crush with your clean hands or a sterilized stainless steel/plastic potato masher.

确保它们干净，将它们放进发酵箱里。用你干净的双手或是不锈钢/塑料的捣土豆器弄碎它们。

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Kentuck appeared at the cabin every afternoon in a clean shirt, his face still shining from the washing he'd given it.

VOA: special.2009.06.06

And the way it manifests itself, as you know from just how people talk, is you're compulsive, you're clean, you're stingy.

这种人格表现为，强迫，有洁癖和吝啬，这些都可从人们谈话方式看出。

耶鲁公开课 - 心理学导论课程节选

You know, she's really nice about it. We don't really talk about it, but we're both very clean people,

她这方面很好。我们真的不需要谈论这个，但我们都是很爱干净的人，

布鲁克林的房价 - SpeakingMax英语口语达人

The Clean Water and Clean Air Acts each cost about one per cent of G.

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Clean water, like clean air, is as important to Americans today as the roof over their heads.

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Make sure to have clean hands and everything your hands touch should be as clean as possible.

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