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  1. Oxford Dictionary

    natural gas

    英式

    • n.
      flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally underground (often in association with petroleum) and used as fuel.

    • noun: natural gas, plural noun: natural gases

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    natural gas

    • IPA[ˌnaCH(ə)rəl ˈɡas]

    美式

    • n.
      flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally ...

    Oxford American Dictionary