例句：

　　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。

　　He took off his glasses.

　　他摘掉了眼鏡。

　　The lid won't come off.

　　蓋子不會脫掉。