1. 桶
    A barrel is a large, round container for liquids or food.

    e.g. The wine is aged for almost a year in oak barrels.
           这葡萄酒已经在橡木桶里存放近一年了。
    e.g. ...barrels of pickled fish.
           几桶腌鱼

2. （石油工业中）一桶的量（相当于159升）
    In the oil industry, a barrel is a unit of measurement equal to 159 litres.

    e.g. In 1989, Kuwait was exporting 1.5 million barrels of oil a day...
           1989年，科威特每天出口150万桶石油。
    e.g. Oil prices were closing at $19.76 a barrel.
           油价收于每桶19.76美元。

3. 枪管
    The barrel of a gun is the tube through which the bullet moves when the gun is fired.

    e.g. He pushed the barrel of the gun into the other man's open mouth.
           他把枪管塞进了另一个人的嘴里。

4. 飞奔；疾驶；高速行驶
    If a vehicle or person is barreling in a particular direction, they are moving very quickly in that direction.

    e.g. The car was barreling down the street at a crazy speed.
           这辆车疯了一般沿街疾驶。

5. see also: pork barrel

6. 全部；完全
    If you say, for example, that someone moves or buys something lock, stock, and barrel, you are emphasizing that they move or buy every part or item of it.

    e.g. They dug up their New Jersey garden and moved it lock, stock, and barrel back home.
           他们把在新泽西的花园刨了个遍，然后将里面的东西一样不落地搬回了家。

7. 使…受制于人；使…处于不利地位；迫使…做…
    If someone has you over a barrel, they have put you in a difficult situation where you have little choice but to do what they want you to do.

8. 凑合用劣质的东西；将就行事
    If you say that someone is scraping the barrel, or scraping the bottom of the barrel, you disapprove of the fact that they are using or doing something of extremely poor quality.

9. 非常有趣的事；笑料不断的开心果
    If an experience is a barrel of laughs, it is very enjoyable. If someone is a barrel of laughs, they are fun to be with.

    e.g. Weddington is the first to admit she's not exactly a barrel of laughs...
           韦丁顿第一个承认自己其实并不爱搞笑。
    e.g. The suppers are always a barrel of laughs.
           晚餐总是充满欢笑。