noble gas

US 
UK 
  • n.稀有气体;惰性气体
  • Web贵气体;高贵气体;贵重气体
Plural Form:noble gases  
noble gas
n.
1.
惰性气体;稀有气体any of a group of gases that do not react with other chemicals. argon , helium , krypton and neon are noble gases .

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