n.面包皮( crust的名词复数 )；糕饼等的酥皮；（泥土、雪等）硬的外层；外皮 双语释义：n.(名词)[C][U]面包皮; 糕饼等的酥皮 hard outer surface of a loaf of bread; pastry covering of a pie, tart, etc.[C][U](泥土、雪等)硬的外层 a hard outer covering, as of earth or snow英英释义： crust[ krʌst ]n.the outer layer of the Eart