potassium nitrate
potassium-nitrate的词性：
n.（名词）
1. A transparent white crystalline compound, KNO3, used to pickle meat and in the manufacture of pyrotechnics, explosives, matches, rocket propellants, and fertilizers. Also called saltpeter
硝酸钾，钾硝：透明的白色晶体状化合物，KNO3，用来腌制肉类，并用于制造烟火、炸药、火柴、火箭推进燃料及化肥 也作 saltpeter