ph.

1. It rained off and on all day.
断断续续下了一天雨。

1. 断断续续,间歇地：now and then 时而,偶尔 | off and on 断断续续,间歇地 | off duty 下班

2. 断断续续地,不时地：occur to 被想到 . | off and on 断断续续地,不时地 . | and so on 等等 .

3. 时而;断断续续地：occur to 突然想到(一个主意等) | off and on 时而;断断续续地 | on a large/small scale 大批量;大规模川、批量;小规模

adv

1. not regularly

e.g. they phone each other off and on

Synonym: on and off