on and off
US /ɑn ənd ɔf/
UK /ɒn ənd ɒf/
短语
断断续续地, 时有时无地
not continuously; intermittently
示例:
•
We've been dating on and off for years.
我们断断续续地约会了好几年。
•
It rained on and off all morning.
整个上午雨下得断断续续。