rare gas
常见例句
- 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 - 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 返回 rare gas