wear off与vanish的区别（wear wearing wears的区别）

wear off:磨损; 磨去; 擦掉;渐渐减少, 逐渐消失; 消逝

These rough roads soon wear the tread of motor tyres off. 这些崎岖不平的路很快就把轮胎的胎面磨平。

vanish:v. 突然不见;消失;变为零;逐渐消失

He was afraid she might vanish if he did not lay hold of her.他担心如果不抓住她，她可能会消失。