火药，是炼丹炼出来的？

Gunpowder was also invented in China. 火药也是中国人发明的。 It came from people who made magic pills. 它来自炼丹的方士。 They mixed saltpeter, sulfur and charcoal. 他们把硝石、硫磺和木炭混在一起。 One mix exploded and made a big fire. 有一次配出的药粉突然爆炸起火。 That is how gunpowder was born. 火药就这样诞生了。 Later it was used in wars and fireworks. 后来它用在战争和烟花里。