a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite
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用作名詞(n.)
The components of a potassium cycle vary greatly. 鉀素循環(huán)的各個(gè)環(huán)節(jié)有很大的變化。
What fruit vegetable contains potassium most? 什么水果蔬菜含鉀最多？