Before the Spring Festival, every family would clean their houses from top to bottom.

春节前，家家户户都会彻底打扫房屋。

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She would clean the house from top to bottom.

她会彻底地打扫房子。

《柯林斯英汉双解大词典》

It also has a built-in bidet spray, to properly clean our bottom; toilet paper doesn't do it.

它还具有一个内置坐盆喷头，有效清洁我们的底部；不需要卫生纸。

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They clean the bottom of a boat.

VOA: special.2010.05.16

We were also impressed with the incredibly clean bottom panel which, while incredibly difficult to photograph, does hide the required pile of stickers and licensed keys that usually pollute the laptop's exterior.

ENGADGET: Lenovo's ThinkPad T430u Ultrabook hands-on Hands-on

Sludge settles to the bottom, leaving clean water on top.

FORBES: Muckraker

They should pass a series of focused, clean bills that have real bottom line impact for the government and consequently every American defined in dollars and cents.

FORBES: Move up http://i.forbesimg.com t Move down