crack
[ADJ, NOUN, VERB]
1. 训练有素的
A crack soldier or sportsman is highly trained and very skilful.
双语例句
例：a crack undercover police officer.
一名训练有素的卧底警察。
ADJ. 形容词
cracks
1. [C 可数名词] 裂缝
A crack is a very narrow gap between two things, or between two parts of a thing.
近义词
chink
双语例句
例：Kathryn had seen him through a crack in the curtains.
凯瑟琳曾从帘子的裂缝看到过他。
2. [C 可数名词] 裂纹
A crack is a line that appears on the surface of something when it is slightly damaged.
双语例句
例：The plate had a crack in it.
这盘子上有条裂纹。
3. [SING 单数型名词] 缝隙
If you open something such as a door, window, or curtain a crack, you open it only a small amount.
双语例句
例：He went to the door, opened it a crack, and listened.
他走到门边，把门打开一条缝，听了起来。
4. [C 可数名词] 爆裂声
A crack is a sharp sound, like the sound of a piece of wood breaking.
双语例句
例：Suddenly there was a loud crack and glass flew into the car.
突然一阵巨大的爆裂声，碎玻璃飞溅进了车内。
5. [U 不可数名词] 强效纯可卡因
Crack is a very pure form of the drug cocaine.
6. [C 可数名词] （挖苦人的）笑话
A crack is a slightly rude or cruel joke.
双语例句
例：Tell Tracy you're sorry for that crack about her weight.
告诉特蕾西你对那个有关她体重的玩笑感到抱歉。
NOUN. 名词
crack down
1. [PHRASAL 短语] 严厉打击 , 镇压
If people in authority crack down on a group of people, they become stricter in making the group obey rules or laws.
近义词
clamp down
双语例句
例：The government has cracked down hard on those campaigning for greater democracy.
政府严厉打击了那些争取更多民主的人。
crack up
1. [PHRASAL 短语] 精神崩溃
If someone cracks up, they are under such a lot of emotional strain that they become mentally ill.
双语例句
例：She would have cracked up if she hadn't allowed herself some fun.
要不是她允许自己享受一些乐趣，她早就得精神崩溃了。
2. [PHRASAL 短语] 哈哈大笑 , 使…哈哈大笑
If you crack up or if someone or something cracks you up, you laugh a lot.
双语例句
例：She told stories that cracked me up and I swore to write them down so you could enjoy them too.
她讲了些让我哈哈大笑的故事，我发誓要把那些故事写下来，以便你们也可以欣赏。
PHRASAL VERB. 短语动词
cracks , cracking , cracked
1. [I 不及物动词] 使…破裂 , 破裂
If something hard cracks, or if you crack it, it becomes slightly damaged, with lines appearing on its surface.
双语例句
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. [I 不及物动词] 使…噼啪作响 , 发出辟裂声
If something cracks, or if you crack it, it makes a sharp sound like the sound of a piece of wood breaking.
双语例句
例：Thunder cracked in the sky.
空中雷声炸响。
3. [T 及物动词] 撞击
4. [T 及物动词] 砸开 , 打破
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.
近义词
双语例句
例：Crack the eggs into a bowl.
把鸡蛋打到碗中。
5. [T 及物动词] 破解（难题、密码）
If you crack a problem or a code, you solve it, especially after a lot of thought.
双语例句
例：He has finally cracked the system after years of painstaking research.
经过数年的艰苦研究，他最终破解了这个系统。
6. [I 不及物动词] （精神）垮掉
If someone cracks, they lose control of their emotions or actions because they are under a lot of pressure.
双语例句
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. [I 不及物动词] （嗓音）变嘶哑
If your voice cracks when you are speaking or singing, it changes in pitch because you are feeling a strong emotion.
双语例句
例：Her voice cracked and she began to cry.
她失声哭了起来。
8. [T 及物动词] 说（笑话）
If you crack a joke, you tell it.
双语例句
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。
VERB. 动词
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