例句：

　　Who turned the heating off?

　　誰把暖氣關掉了？

　　They're ready for the off.

　　他們準備起跑了。

　　Hang on tight. We're off!

　　抓緊，我們出發(fā)了！

　　That mark won't come off.

　　那污點去不掉。