one at a time还有two at a time 的意思,相应的three at a time

问题描述:

one at a time
还有two at a time 的意思,相应的three at a time

没有准确意识,都是歌的名字。

一次三个
Enter two at a time.
每次进来两人。
Pass me the bricks two at a time.
每次递给我两块砖。

one at a time:
ad.每次一个
就这么推下去

一次两个