on and off片语

断断续续地、时而、偶尔

It rained on and off for most of the afternoon.

整个下午断断续续地下著雨。

分分合合用于感情关系

They dated on and off for almost ten years.

他们交往了将近十年，分分合合。

时开时关、一开一关

The warning light kept flashing on and off.

警示灯不停地一亮一灭。

断断续续的、时有时无的

She has an on-and-off relationship with her ex.

她和前任的关系一直分分合合。