in no time/at one time/at a time/in some time这些词都是什么意思?

题目

in no time/at one time/at a time/in some time这些词都是什么意思?

答案

in no tim 立刻,马上,一会 The kids wil be leaving home in no time.at one time/point 曾经,一度 At one time,he was my best friend.at a time 每次,逐一,依次 She ran up the stairs two at a time.in some time...