| 释义 |
氪kè气体元素,符号Kr(kryptonum)。无色,无臭,无味,大气中含量极少,化学性质很不活泼。能吸收X射线,用作X射线的屏蔽材料等。{krypton (Kr); colourless, odourless, flavourless, and rather inert gaseous element that exists in tiny amount in the atmosphere and can absorb X-rays, oft. used as material for screening X-rays} |