1. crack on : 继续疾走；
2. crack wise : 说俏皮话；
3. crack up : 撞坏, 衰退；
及物动词
1. His voice cracked with grief.
他的嗓子由于悲伤而变哑了。
2. He wanted to crack the rowdy over the head, but refrained.
他想猛击小流氓的头，可还是忍住了。
不及物动词
1. Her voice cracked with grief.
她悲伤得语不成声。
名词
1. He said he didn't know how to swim but he would take a crack at it.
他说他不会游泳，但将尽力尝试一下。
2. crack
2. There are many cracks in the old wall.
墙上有许多裂缝。
1. 裂缝：并通过顶针式设计解决了支点在岩壁上转动的问题;从形态上,从原来简单的直壁(Vertical),俯角(Overhang)、屋檐(Roof)基础上出现了斜坡(Slab)、夹角(Open-book)、烟囱(Chimney)、裂缝(Crack)、石柱(Pillar)等不同形状,
2. 裂纹：p8S$g)v:q/_4M,X5}中国家具论坛,中国家具网,家具论坛,家具网,家俱论坛,办公家具,家居,家具4、 裂纹(Crack):是顺木纹方向的纤维分裂. 以环裂(Ring Shake)和心裂(Heart Shake)所引起的缺陷对树木影响最大,
3. 裂痕：如果以一块软钢试料来作抗拉试验及疲劳试验,结果会发现,抗拉试验的巨大拉力所造成的破坏断面上会呈现丝纹纤维状的结构;而疲劳试验的反覆应力所造成的破坏断面,在电子显微镜下,通常会呈现显明的裂痕(crack),而如果试验是采取悬臂梁(cantilever)的方式,
4. crack
4. 破裂：市场破裂 (Crack) 过后,市场通常会因其后出现的反弹 (Rebound) 而恢复元气. 因为下挫会伴随著相若力度的反弹,令高位重现,使群众的乐观心态又再次稳定过来,准备再次疯狂投入市场的派对. 有些人会利用破裂过后的反弹 (Rebound) 赚取利润.
动词用法（VERB USES）
1. (使)破裂;(使)裂开;(使)断裂
If something hard cracks, or if you crack it, it becomes slightly damaged, with lines appearing on its surface.
crack什么意思
e.g. A gas main had cracked under my neighbour's garage and gas had seeped into our homes...
邻居车库下面的煤气总管裂开了，煤气渗入了我们家。
e.g. Remove the dish from the oven, crack the salt crust and you will find the skin just peels off the fish.
把盘子从烤箱里拿出来，弄碎鱼表面的那层盐，鱼皮就会从鱼身上剥落下来了。
2. (使)发出爆裂声;(使)噼啪作响
If something cracks, or if you crack it, it makes a sharp sound like the sound of a piece of wood breaking.
crack的反义词
e.g. Thunder cracked in the sky...
空中雷声咔嚓作响。
e.g. He cracked his fingers nervously.
他紧张不安地把手指按得咔吧作响。
3. 重击;猛击
If you crack a hard part of your body, such as your knee or your head, you hurt it by accidentally hitting it hard against something.
e.g. He cracked his head on the pavement and was knocked cold.
他一头撞到人行道上，不省人事了。
4. 打破;砸开;砸碎
When you crack something that has a shell, such as an egg or a nut, you break the shell in order to reach the inside part.
e.g. Crack the eggs into a bowl.
把鸡蛋打在一个碗中。
5. (尤指经过反复思考)找到…的解决办法，破译(密码)
If you crack a problem or a code, you solve it, especially after a lot of thought.
e.g. He has finally cracked the system after years of painstaking research.
经过多年的努力研究，他终于找到了破解这个系统的办法。
6. (因压力大而)失控，崩溃，瓦解
If someone cracks, they lose control of their emotions or actions because they are under a lot of pressure.
e.g. She's calm and strong, and she is just not going to crack...
她镇定而且坚强，绝不会垮掉。
e.g. I had the conviction Larkin's nerve would crack and he'd squeeze the trigger in a reflex action...
我确信拉金会神经崩溃，他会反射性地扣动扳机。
7. (因感情强烈而嗓音)变嘶哑，变沙哑
If your voice cracks when you are speaking or singing, it changes in pitch because you are feeling a strong emotion.
e.g. Her voice cracked and she began to cry.
她的声音变得沙哑，继而哭了起来。
8. 说(笑话);开(玩笑)
If you crack a joke, you tell it.
e.g. He cracked jokes and talked about beer and girls.
他爱说笑话，喜欢谈论啤酒和姑娘。
9. see also: cracked;cracking
10. 不如别人说的那么好
If you say that something is not all it's cracked up to be, you mean that it is not as good as other people have said it is.
crack的反义词
e.g. Package holidays are not always all they're cracked up to be.
全包旅游并不总像人们说的那么好。
动词用法（VERB USES）
1. (使)破裂;(使)裂开;(使)断裂
If something hard cracks, or if you crack it, it becomes slightly damaged, with lines appearing on its surface.
crack什么意思
e.g. A gas main had cracked under my neighbour's garage and gas had seeped into our homes...
邻居车库下面的煤气总管裂开了，煤气渗入了我们家。
e.g. Remove the dish from the oven, crack the salt crust and you will find the skin just peels off the fish.
把盘子从烤箱里拿出来，弄碎鱼表面的那层盐，鱼皮就会从鱼身上剥落下来了。
2. (使)发出爆裂声;(使)噼啪作响
If something cracks, or if you crack it, it makes a sharp sound like the sound of a piece of wood breaking.
crack的反义词
e.g. Thunder cracked in the sky...
空中雷声咔嚓作响。
e.g. He cracked his fingers nervously.
他紧张不安地把手指按得咔吧作响。
3. 重击;猛击
If you crack a hard part of your body, such as your knee or your head, you hurt it by accidentally hitting it hard against something.
e.g. He cracked his head on the pavement and was knocked cold.
他一头撞到人行道上，不省人事了。
4. 打破;砸开;砸碎
When you crack something that has a shell, such as an egg or a nut, you break the shell in order to reach the inside part.
e.g. Crack the eggs into a bowl.
把鸡蛋打在一个碗中。
5. (尤指经过反复思考)找到…的解决办法，破译(密码)
If you crack a problem or a code, you solve it, especially after a lot of thought.
e.g. He has finally cracked the system after years of painstaking research.
经过多年的努力研究，他终于找到了破解这个系统的办法。
6. (因压力大而)失控，崩溃，瓦解
If someone cracks, they lose control of their emotions or actions because they are under a lot of pressure.
e.g. She's calm and strong, and she is just not going to crack...
她镇定而且坚强，绝不会垮掉。
e.g. I had the conviction Larkin's nerve would crack and he'd squeeze the trigger in a reflex action...
我确信拉金会神经崩溃，他会反射性地扣动扳机。
7. (因感情强烈而嗓音)变嘶哑，变沙哑
If your voice cracks when you are speaking or singing, it changes in pitch because you are feeling a strong emotion.
e.g. Her voice cracked and she began to cry.
她的声音变得沙哑，继而哭了起来。
8. 说(笑话);开(玩笑)
If you crack a joke, you tell it.
e.g. He cracked jokes and talked about beer and girls.
他爱说笑话，喜欢谈论啤酒和姑娘。
9. see also: cracked;cracking
10. 不如别人说的那么好
If you say that something is not all it's cracked up to be, you mean that it is not as good as other people have said it is.
crack的反义词
e.g. Package holidays are not always all they're cracked up to be.
全包旅游并不总像人们说的那么好。