pro·pane /ˈproˌpen/
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  pro·pane /ˈproˌpen/ 名詞
  Pro·pane n.  Chem. A heavy gaseous hydrocarbon, C3H8, of the paraffin series, occurring naturally dissolved in crude petroleum, and also made artificially; -- called also propyl hydride.
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  propane
       n : colorless gas found in natural gas and petroleum; used as a
           fuel