inert gas 基本英英近义反义例句 惰性气体 化学 Noun: any of the chemically inert gaseous elements of the helium group in the periodic table近义词argonon惰性气体noble gas惰性气体 Helium and neon are inert gases.氦和氖为惰性气体。 It is not necessary to replace air withinert gas.不必用惰性气体置换空气。