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Từ điển WordNet v3.1 - WordNet Dictionary
inert gas
any of the chemically inert gaseous elements of the helium group in the periodic table • Syn: noble gas, argonon • Hypernyms: chemical element, element, gas • Hyponyms: argon, Ar, atomic number 18, helium, He, atomic number 2, krypton, Kr, atomic number 36, neon, Ne, Ne, radon, Rn, atomic number 86, xenon, Xe, atomic number 54
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