wear away
柯林斯词典
1. PHRASAL VERB If you wear something away or if it wears away, it becomes thin and eventually disappears because it is used a lot or rubbed a lot. 使磨损
It had a saddle with springs sticking out, which wore away the seat of my trousers. 马鞍上的弹簧翘了出来，磨坏了我臀部的裤子。
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