n.<化>钾;
例句:
The components of a potassium cycle vary greatly.
钾素循环的各个环节有很大的变化.
Sodium and potassium are about the same in their chemical properties.
钠和钾的化学性质几乎是相同的.
Gunpowder is composed of sulfur, carbon, and potassium nitrate.
火药是由硫 、 碳和硝酸钾组成.