Factory wastewater has to be cleaned before it goes back to nature.

工厂废水在回归自然之前必须进行净化。

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I have managed to convince myself that if it weren't for my job I would immediately head out for the open spaces and go back to nature in some sleepy village buried in the country.

我设法说服自己，如果不是为了我的工作，我会立即前往空旷的地方，在坐落于乡间的寂静村庄里回归自然。

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She began to research playground equipment and found many experts touting the benefits of 'back to nature' unstructured play.

VOA: standard.2010.06.25

Well, most basically it's about... Yoga is about getting back to nature

唔，基本上是……瑜伽的宗旨是回归自然，

瑜伽的魅力 - SpeakingMax英语口语达人

It's crucial, as I say, and I'm going to be coming back to it, but it's just a point I want to make in passing about the nature of theory now.

这一点至关重要，而且我以后还会再次提到，但现在关于理论的本质我就谈到这里。

耶鲁公开课 - 文学理论导论课程节选

Ms. Ivie purchased these products, produced by Kraft Foods, Cadbury, and Back to Nature, over a four-year period.

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Take these next two weeks as an opportunity to go back to nature.

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But in this field, the best answer is probably to go back to nature or, at least, to snaffle her best ideas.

ECONOMIST: MONITOR