crust
[krʌst] noun
countable or uncountable
■a hard outer covering of something （某物的）硬皮，外壳•pie crust (= the cooked pastry on top of it)馅饼皮 •the Earth's crust地壳 countable
■the outside layer of a loaf of bread 面包皮•Could you cut the crusts off the sandwiches, please?请把三明治的面包皮切掉，好吗？ |