barrel
单词辨析：
通常用于装液体之物，一般由木头或金属制成。
Two pails of water are needed in order to make a meal.
做一顿饭需要两桶水。
How did you clean the milk pail?
你是怎么清理牛奶桶的？
指中间鼓起的大桶，多由木头或金属制成，通常用于储存啤酒、葡萄酒等，也常用作原油的计量单位。
mpty beer barrels
空啤酒桶
Our wine is aged in oak barrels.
我们的葡萄酒是用橡木酒桶放陈的。
Oil prices remained as low as $22 per barrel.
原油价格保持在每桶22美元的低价位。
可装各种东西，尤指液体之物。
He can lift two buckets of water at the same time.
他可以同时提起两桶水。
She stored the cracked wheat in a bucket.
她把碾碎的小麦储存在桶里。
相关例句：
This machine uses the special designed screw and barrel, die and extrusion process to produce plastic and wood products.
这台机器采用了特殊设计的螺杆和桶，模具和挤压过程，以生产塑料和木材产品。
This is a new barrel era which is the expression of a new phase in national security.
这是一个新的油桶时代，表示国家安全进入了一个新的阶段。
The barrel of gunpowder blew up.
火药桶爆炸了。
He had me over a barrel because he knew my carefully-guarded secrets.
我受制于他，因为他掌握了我严守的秘密。
Barrel and bottom of large size ladles and refining ladles.
大型钢包和精炼钢包的包壁和包底。
With the onset of war, oil prices climbed past$ 30 a barrel.
战争一爆发，油价就攀过了每桶30美元。