It is pleasant to live in a clean environment.

生活在干净的环境中是一件非常让人快乐的事情。

youdao

His task was to elaborate policies that would make a market economy compatible with a clean environment.

他的任务是周密地制定能够让市场经济适合于无污染的环境的政策。

《柯林斯英汉双解大词典》

Clean environment = clearer mind.

整洁环境=更清醒的头脑。

youdao

We all want good jobs, good schools, health care, safe streets, a clean environment.

CNN: Clinton: Time again to choose a more perfect union

He will do right on behalf of the American consumers for a clean environment and affordable reliable energy.

CNN: Gore to unveil plan to lower gas prices

The mice at NYU live in a super-clean environment, and those imported from other labs carry a risk of contamination.

WSJ: Scientists focus on another Sandy loss _ lab mice