on and on 与 on and off 的区别?
问题描述:
on and on 与 on and off 的区别?
老师给的解释是continually和continuously,我感觉没什么区别.
答
为你解答.
on and on:持续不断地(中间无间隔)
on and off:时断时续地(意即中间有多次间隔)