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N-COUNT
面包皮
The crust on a loaf of bread is the outside part.
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N-COUNT
(馅饼的)酥皮
A pie's crust is its cooked pastry.
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N-COUNT
(尤指较软或较湿的物质上的)硬层，硬皮
A crust is a hard layer of something, especially on top of a softer or wetter substance.
例句
As the water evaporates, a crust of salt is left on the surface of the soil.
随着水分的蒸发，地面上留下了一层结晶盐。
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N-COUNT
地壳
The earth's crust is its outer layer.
例句
Earthquakes leave scars in the earth's crust.
地震会在地壳上留下裂痕。
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PHRASE
(尤指通过做不愿意做的工作)谋生
If you earn a crust, you earn enough money to live on, especially by doing work you would prefer not to do.
例句
In his early days, he would do almost anything to earn a crust from the sport.
早年为了能在体育界混口饭吃，他几乎什么都做。