crustBrE/krʌst/NAmE/krʌst/noun[C, U]thehardoutersurfaceofbread面包皮◆sandwicheswiththecrustscutoff切掉面包皮的三明治[C, usually sing.]alayerofpastry, especially on top of a pie糕饼(尤指馅饼)酥皮◆Bakeuntilthecrustisgolden. 把糕饼烤至外皮呈金黄色。[C, U]ahardlayerorsurface, especiallyaboveoraroundsthsoftorliquid(尤指软物或液体上面、周围的)硬层,硬表面◆athincrustofice一层薄冰◆theearth'scrust地壳➡ see alsoupper crust●ˌearna/yourˈcrust(BrE, informal) toearnenoughmoneytoliveon挣钱糊口;谋生