trade off

• • 不时地交替换位：

    The two teams traded off with each other several years for first place in the football league.

    这两队几年来轮番获得足球联赛的冠军。

  • 交替使用：

    We traded off large and small brushes for rough and fine work.

    我们交替使用大小刷子来做粗活和细活。

  • [亦作 trade away] 以…易货；拿…作物物交换；以…作为交换；卖掉；换掉:

    He traded off his watch for a tape recorder.

    他用手表换了一台收音机。