"There are different ways of evaluating how well stormwater practices clean water things like ponds and wetlands and permeable pavement."

VOA: standard.2010.08.04

Broom meant to make a clean sweep of things, a clean sweep of what had come before.

扫帚》的寓意是将事情做个彻底的了结，对曾经发生过的事情一扫而空。

耶鲁公开课 - 现代诗歌课程节选

So, you say to your roommate because you want the house to be clean and things to change.

为了屋子变得整洁，情况有所改善，你可以跟你的室友说，

I'm afraid of 课堂 - SpeakingMax英语口语达人