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Short "hint"

mixture of gaseous hydrocarbons that accumulates in porous sedimentary rocks

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Usage examples (32)
  • This natural-gas car is purely run on natural gas.
  • Why aren't we moving faster toward a natural-gas economy?
  • But most natural-gas cars will usually run on either fuel.
  • They want Aceh to get a much bigger piece of its natural-gas earnings.
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