crust

面包皮、外皮

He cut the crusts off the sandwiches for the children.

他把三明治的面包皮切掉给小孩吃。

派皮、饼皮

The apple pie had a golden, flaky crust.

这个苹果派的派皮金黄又酥脆。

地壳

Earthquakes happen when plates in the earth's crust shift.

当地壳的板块移动时就会发生地震。

硬壳、硬皮、结壳

A thin crust of ice had formed on the pond overnight.

池塘表面一夜之间结了一层薄冰壳。

结硬皮、结壳

Snow had melted and crusted over on the driveway.

车道上的雪融化后又结成了一层硬壳。