crack /kræk/ CET4 TEM4 ( cracking, cracked, cracks )

• 1. 

  V-T/V-I If something hard cracks, or if you crack it, it becomes slightly damaged, with lines appearing on its surface. 使…破裂; 破裂

  例：

  A gas main had cracked under my neighbour's garage and gas had seeped into our homes.

  邻居家车库下的煤气主管道破裂了，煤气渗漏进我们家。

• 2. 

  V-T/V-I If something cracks, or if you crack it, it makes a sharp sound like the sound of a piece of wood breaking. 使…噼啪作响; 发出辟裂声

  例：

  Thunder cracked in the sky.

  空中雷声炸响。

• 3. 

  V-T 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. 撞击

  例：

  He cracked his head on the pavement and was knocked cold.

  他的头撞着了路面，撞昏了。

• 4. 

  V-T 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. 叩开

  例：

  Crack the eggs into a bowl.

  把鸡蛋打到碗中。

• 5. 

  V-T If you crack a problem or a code, you solve it, especially after a lot of thought. 破解 (难题、密码)

  例：

  He has finally cracked the system after years of painstaking research.

  经过数年的艰苦研究，他最终破译了该系统。

• 6. 

  V-I If someone cracks, they lose control of their emotions or actions because they are under a lot of pressure. (精神) 垮掉 [非正式]

  例：

  She's calm and strong, and she is just not going to crack.

  她冷静而坚强，决不会垮掉的。

• 7. 

  V-I If your voice cracks when you are speaking or singing, it changes in pitch because you are feeling a strong emotion. (嗓音) 突然变化

  例：

  Her voice cracked and she began to cry.

  她失声哭了起来。

• 8. 

  V-T If you crack a joke, you tell it. 说 (笑话)

  例：

  He drove a Volkswagen, cracked jokes, and talked about beer and girls.

  那时他开着一辆大众牌汽车，讲着笑话，谈论着啤酒和女孩。