crack什麽意思：n.裂縫；裂紋；縫隙；嘗試。v.斷裂；破裂；打擊；崩潰。adj.訓練有素的；技藝高超的；優秀的；壹流的。adv.尖銳地美。讀： [kr?k]英?[kr?k]。
例句：The door opens just a crack and a single arm emerges with a ticket in hand.只見廁所門打開壹條小縫，壹只舉著壹張車票的手伸了出來。
Except for a small length of web at the first fracture location, none of thcracksexhibited a brittle fracture mode of crack propagation.除第壹個斷裂位置的壹小段腹板外，沒有壹條裂紋顯示出裂紋擴展的脆性斷裂模。
Deutsche Bank was an aggressive dealer in CDOs in the period when the marketwas beginning to crack.在市場開始破裂時，德意誌銀行是擔保債務憑證的積極經銷商。