| 释义 |
atomic number 2
基本英英
英Noun:a very light colorless element that is one of the six inert gasses；the most difficult gas to liquefy；occurs in economically extractable amounts in certain natural gasesas those found in Texas and Kansas
Noun:
a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases as those found in Texas and Kansas |