rare gas
常見例句
- Helium is the lightest rare gas .
氦是最輕的稀有氣體。 - Neon, a rare gas in the air, takes only fractional percentage point of the volume.
氖是空氣中的稀有氣體，只占空氣體積的千分之幾。 - Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.
原子序數(shù)18，原子量39。948，是一種稀有氣體。1894年由英國(guó)化學(xué)家瑞利和拉姆賽發(fā)現(xiàn)。
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