crack : 多指因长期使用或经受压力，物体表现呈现裂纹、裂口或破裂、裂开，但一般没成碎片。A stone hit the window and cracked the glass.石块击中窗户，打裂了玻璃。I cracked my tooth as I fell.我摔倒时把牙齿磕了一道裂缝。The walls cracked and the roof collapsed in the earthquake.地震中墙壁开裂，屋顶坍塌。crush : 指用力把东西压破或变形。The package had been badly crushed in the post.包裹在邮寄过程中被压而严重受损。Add three cloves of crushed garlic.加入3瓣捣碎的大蒜。His arm was badly crushed in the car accident.他的胳膊在车祸中被压成重伤。
collision [k'lin] n. 1.碰撞；互撞；撞击 2.冲突，抵触 3.【物理学】碰撞(粒子或物体的彼此冲击) 短语: come into collision (with) (与…)相撞；(同…)冲突起来[亦作be in collision (with)] crash1 [kr] vt. 1.打碎，砸碎，粉碎： She crashed the glass angrily against the table. 她愤怒地把玻璃杯摔碎在桌子上。 2.使(飞机)坠毁；使(车辆)猛撞；使撞坏；使发生巨响(常与in， through，out等连用)： The driver crashed the bus through a brushwood. 司机把公共汽车开进了灌木丛中。 3.[口语]擅自闯入，未经许可进入；不买票而入： A few young men crashed the gate at the football game. 有几个年轻人不买票就闯入大门看足球赛。 vi. 1.砰地一声破碎，摔得粉碎： The library crashed to the ground. 图书馆轰隆一声倒塌了。
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