metallic element, 1807, coined by English chemist Sir Humphrey Davy (1778-1829) from Modern Latin potassa, Latinized form of potash (q.v.). Davy first isolated it from potash. Symbol K is from Latin kalium "potash," from Arabic al-qaliy "the ashes, burnt ashes" (see alkali).
权威例句
1. These chemicals modulate the effect of potassium.
这些化学物质可以调节钾的功效。
2. Fruits, vegetables, and wholegrains are rich in potassium.
水果、蔬菜和全谷物富含钾元素。
3. No potassium did we find in this mineral.
在这种矿石中我们没有发现钾.
4. The potassium content of foodstuffs is very variable.
食物中钾的含量差别很大。
5. Gunpowder is composed of sulfur, carbon, and potassium nitrate.