aff and on的用法和样例:
例句
- 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。
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