saltpeter
n. 硝石
近义词：saltpetre，nitre，niter，potassiumnitrate，
英英释义
Noun
- (KNO3) used especially as a fertilizer and explosive
例句
用作名词(n.)
- Early Chinese scientists discovered that they could make an explosive substance by mixing sulphur, charcoal and saltpeter.早期的中国科学家发现把硫磺，木炭和硝石混合在一起可以制作出能够爆炸的物质。