His father's death, when Frost was a boy, represented, among other things, an economic crisis for his family. Frost's schooling was erratic.

他小时候父亲去世，因为他家陷入了经济危机,所以他上学总是断断续续。

耶鲁公开课 - 现代诗歌课程节选

I have lived here off and on since 2007. I am a journalist.

从2007年起，我就断断续续地住在这儿。我是一个记者。

纽约的景点 - SpeakingMax英语口语达人

I study on and off in Baruch College

我断断续续的柏鲁克分校学习，

在纽约的感受 - SpeakingMax英语口语达人