Crackenn.克拉肯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 criminal case侦破crack-tip element裂尖单元crack investigation裂缝调查Cracking by shaking震裂溃屈crack bridgedensity裂缝密实度crack tip curvature裂纹尖端曲率crack opening angle裂纹张开角crack-controlling裂缝控制crack over the city(烟火)在这城市上空劈劈啪啪地爆响crack at early ages早期裂缝