off and on

off and on

断断续续, 不时地

例句与用法：

A device that automatically switches an electric lamp off and on, as in a commercial display sign.

闪光装置如广告宣传告示上的一种自动点燃或熄灭电灯的装置

Recently it rained off and on every day.

近来每天都在断断续续地下雨。

He has been writing to us off and on for several years.

他断断续续地给我们写信已经有好几年了。

He only accepted the primary education off and on in his childhood.

他小时候只断断续续地接受过初等教育。

词形变化：

动词过去式: offed | 动词过去分词: offed | 动词现在分词: offing | 动词第三人称单数: offs |

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断断续续地

It snowed off and on all morning.

整个早上雪下下停停。

It rained off and on all day.

断断续续下了一天雨。