crackupn.撞坏(碰撞；失去控制；崩溃)crackv.破裂；砸开；发出爆裂声；撞击；破解；变嘶哑；崩溃；制裁；<非正式>开玩笑n.裂缝；裂痕；爆裂声；猛击；尝试；俏皮话adj.训练有素的crack distribution裂缝分布crack surface form裂面形态cracks in concrete砼裂缝cracked wax olefin石蜡裂化烯烃cracking equipment裂化设备crack-per-pass单程裂化量crack growth rates裂纹扩展速率cracks in abutment台身裂缝crack of shrinking收缩裂缝crack-capability断裂性能