释义
n. 外壳,坚硬的外壳,面包皮 v. 盖以硬皮,结硬皮
例句
1. The snow crusted the lake last night. 昨夜的雪使湖面结了冰。 2. The crust on the snow was thick enough for us to walk on it. 外层的雪已经冻硬,可以在上面行走。