rare gas

常见例句

双语例句

• Helium is the lightest rare gas .
  氦是最轻的稀有气体。
• 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。
• Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.
  原子序数18，原子量39。948，是一种稀有气体。1894年由英国化学家瑞利和拉姆赛发现。
  kkdict.com

权威例句

• Getting Mars back online early was a triumph for Shell--and a rare piece of good news for the world's third-largest oil and gas company.
  FORBES: Shell Shocked
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