One bright morning I decided to clean my flat, including washing the window on the inside.

一个阳光明媚的早晨，我决定打扫我的公寓，包括擦一下窗户的内侧。

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Now clean up the window.

现在把窗户擦干净。

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Three of us sweep and mop the floor and the remainder clean the window.

我们之中三人扫地拖地板，其余的人擦玻璃。

《新英汉大辞典》

She said children would "look out the window of their family car and see that clean energy is part of their lives."

VOA: special.2009.06.19

The table cloths were even more clean and white than they had seemed through the window.

VOA: special.2009.09.05

For some reason they won't stick to my window, and yes, before you ask, yes I do keep it clean.

ENGADGET: Ask Engadget: best smartphone car mount? Mobile

Common exemptions include where a hosepipe is used to clean cars, windows or outdoor surfaces - this covers car washing businesses and window cleaners.

BBC: Q&A: Hosepipe bans

Large hurricanes, like Sandy, can create clean-up jobs and stimulate GDP growth, although, as Bastiat pointed out in his Broken Window Fallacy, much of the spending will be diverted spending rather than net new spending.

FORBES: Jobs and Public Policy