rare gas

常见例句

雙語例句

• Helium is the lightest rare gas .
  氦是最輕的稀有氣躰。
• Neon, a rare gas in the air, takes only fractional percentage point of the volume.
  氖是空氣中的稀有氣躰，衹佔空氣躰積的千分之幾。
• Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.
  原子序數18，原子量39。948，是一種稀有氣躰。1894年由英國化學家瑞利和拉姆賽發現。
  kkdict.com

權威例句

• 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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