while作介词时,什么意思吗?

问题描述:

while作介词时,什么意思吗?

没有做介词的用法,以下是做连词时的意思:1.当...的时候,和...同时She listened closely while he read the letter.他读信时,她听得很仔细.I'll take care of your children while you are away.你不在时我会照顾你...