rub off

• • 擦掉；抹掉：

    She rubbed the exercises off the blackboard after class.

    下课后她把习题从黑板上擦掉。

  • [口语]使减色；使显得暗淡：

    It did not take long for the glory of our victory in the Second World War to rub off.

    没过多久我们在第二次世界大战中取得胜利的光辉景象就变得暗淡无光了。