rare gas [化学] 稀有气体 ; 惰性气体 ; 罕有气体 ; 现又称稀有气体
rare gas laser 稀有气体激光器 ; 稀有气体激光元
rare gas elements 惰性气体元素
rare gas eximer 稀有气体激光元
rare gas excimer laser 稀有气体激元激光器
rare gas room 稀有气体间
rare gas configuration 稀有气体构形
mercury-rare gas laser 水银 ; 稀有气体混合蒸气激光器 ; 汞一铯真空紫外激光器
rare gas element 惰性气体
rare gas halogenide laser 稀有气体卤化物激光器 ; 稀有气体卤化物雷射
A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk.
极环星系是种稀有的星系类型，它们有着几乎和银盘平面垂直，呈环形公转的大量的恒星、气体和星尘。
Neon, a rare gas in the air, takes only fractional percentage point of the volume.
氖是空气中的稀有气体，只占空气体积的千分之几。
Even human engineers have difficulty with it, which is one reason why revolving buildings—with their need for water, sewerage, gas and electrical connections—are so rare.
就连人类的工程师，也很难处理。 这就是为什么带有水源供给，废水排污，煤气管道和电气线的旋转建筑那么稀缺的原因。
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