n.面包皮,外壳,硬外皮,地壳
vt.用外皮覆盖,在…上结硬皮,生痂儿
vi.结成外壳,结硬皮
The crust of the bread is burnt.
这块面包的外皮烤焦了.
Sergeant Parrott normally spoke with an upper-crust accent.
帕罗特军士说话通常带着上流社会的腔调。
The pastry crust was always underdone.
馅饼的壳皮常常烤得不透.