off and on与on and off有偶然的的意思么?

off and on与on and off有偶然的的意思么? on and on 与 on and off 的区别? on- and off- balance 体育英语里面的off-and-on,shootaround是什么意思? on and off 可用其它的短语替代吗 Put on your shirt and take off your hat.的中文意思 英语翻译是与3g业务有关的，全句是：Same cost for On- and Off-Deck access put on,put off,put up的意思与区别 单反相机on和off的意思是什么? get off(on)的中文意思是什么 帮翻译一下On and Off Premise the light keeps going on and off