| 释义 |
氦hài气体元素,符号He(helium)。无色无臭无味,在大气中含量极少,化学性质极不活泼。可用来填充灯泡和霓虹灯管,也用来制造泡沫塑料。液态的氦常用做冷却剂。{helium (He); colourless, odourless inert gaseous element found in rare amounts in the atmosphere, used to fill light bulbs and neon tubes, and to produce foam plastics. Liquid helium is oft. used as a coolant.}通称{commonly known as}氦气{hàiqì}。 |