火药的英文：
gunpowder

An explosion of gunpowder shatters a rock.
火药把岩石炸碎。

Sulphur is a constituent of gunpowder
硫是火药的组分。

When the gunpowder exploded, the bullet was expelled from the gun.
火药爆炸时，子弹从枪中射出。

Gunpowder is composed of sulfur, carbon, and potassium nitrate.
火药是由硫、碳和硝酸钾组成。

An explosive mixture,such as gunpowder.
火药易爆炸的混合物，如弹药

I began to see we should have a brush for it in earnest, and looked to my priming.
我意识到一场真枪实弹的鏖战已在所难免，就看了看我的火药。

When the gunpowder exploded, the bullet was expelled from the gun
火药一爆炸，子弹就从枪中射出。

Our powder has to take fire instantaneously so that its mechanical effect may be complete
只要火药能够很快地燃烧，使它的力量能得到充分的发挥就行了。

explosive train
火药系

The action of firing the gun ignited this powder train.
开枪引燃了火药导火索。

It is dangerous for children to tamper with gunpowder.
孩子们玩弄火药是危险的

The Chinese anticipated the European discovery of gunpowder.
中国人早于欧洲人发现了火药。

Sulphur can be used to make gunpowder.
硫磺可以用来制造火药。

Gunpowder is composed of sulfur, carbon, and potassium nitrate.
火药是由硫、碳和硝酸钾组成。

Small cavity for gunpowder in the lock of an old type of gun
(旧式枪上的)火药池