rub off

动词 rub off:

1. wear away
   同义词：abrade, corrade, abrase, rub down

1. The mud rub off quite easily.
   泥巴很容易就能擦掉。
2. Who's rubbed my figures off the blackboard?
   谁把我写在黑板上的数字擦掉了?
3. These stains won't rub off.
   这些污迹擦不掉。
4. Rub the mud off your trousers.
   把你裤子上的泥擦掉。