aff and on
英
美
- AFF [计]故障自动查寻
- and conj.和；加；接着；那么
- on prep.在...之上；由...支撑着；在（某一天）；关于；基于adv.穿着；向前（移动)；表示持续性adj.表示已连接、处于工作状态或使用中；发生；值班
- He had been work here,on and off,for two years.
他在这儿断断续续工作了两年。
- I began to write intermittently and spasmodically.
我开始断断续续地写了起来。
- He had to work all day and every day to earn a living.
为了谋生，他只有永不间歇地工作。
- A numbers station is a government operated radio station broadcasting intermittently on the short-band frequencies.
电台是政府操作的无线电发射站，间歇地发射短波频率。
