断断续续地; 不时; 间歇地; 时作时辍
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