例句：

　　Who turned the heating off?

　　誰把暖氣關(guān)掉了？

　　They're ready for the off.

　　他們準(zhǔn)備起跑了。

　　Hang on tight. We're off!

　　抓緊，我們出發(fā)了！

　　That mark won't come off.

　　那污點(diǎn)去不掉。