noun 下载 🔗分享 钾 A soft, waxy, silvery reactive metal that is never found unbound in nature; an element (symbol K) with an atomic number of 19 and atomic weight of 39.0983. The symbol is derived from the Latin kalium. Examples : "The fertilizer contained potassium to help the plants grow stronger. " 这种肥料含有钾，能帮助植物更茁壮地生长。 element chemistry substance material science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 钾, 钾原子 A single atom of this element. Examples : "A single potassium atom is too small to see with the naked eye. " 一个单独的钾原子太小了，肉眼无法看见。 element chemistry substance 与AI对话词汇游戏阅读练习
