saltpeter
n. 硝石;硝酸钾
例句
From saltpeter mines in Chile.
从智利的硝石矿里。
Well, the British didn't let Chile sell saltpeter to Germany.
英国不允许,智利把硝石卖给德国。
The nitrate is also called saltpeter, and the carbonate is called potash.
硝酸盐亦称硝石,碳酸盐亦称钾碱。