n. a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
n. 火药
[化] 有烟火药; 火药
1. The soldiers used gunpowder to fire their cannons.
士兵们用火药来射击他们的炮。
2. Gunpowder was invented in China many centuries ago.
火药是在几个世纪前中国发明的。
3. The fireworks display was filled with colorful explosions of gunpowder.
烟花表演中充满了五彩缤纷的火药爆炸。