off and on -用法

off and on

not regularly；occasionally时辍时续的

It rained off and on all day．雨断断续续地下了一整天。

He wrote to a girl in London off and on for several years．他与伦敦的一位姑娘断断续续地通了几年信。

We don't go to the theatre regularly，just off and on．我们不常去看戏，只是偶尔看看罢了。