I can only do one thing at a time. [=at once]我一次只能做一件事。
Please speak one at a time. [=so that only one person is speaking at any time]请一个一个地发言。
We carried the boxes two at a time up the stairs. [=we carried two boxes each time we went up the stairs]我们每次搬两个箱子上楼。
2
:during one period of time without stopping一下子;持续不断地
She can sit and read for hours at a time. [=at a stretch]她可以坐在那儿连续读上几个小时。
3
◊ If you take one day at a time or take it/things one day at a time, you make progress in a slow and careful way by dealing with each day as it comes.一点一点推进;一步一步地来
We got through the ordeal by taking one day at a time. [=taking it day by day]我们挺过了一天又一天,终于渡过了难关。