deflagration
  爆燃
  Def·la·gra·tion n.
  1. A burning up; conflagration. “Innumerable deluges and deflagrations.”
  2. Chem. The act or process of deflagrating.
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  deflagration
       n : combustion that propagates through a gas or along the
           surface of an explosive at a rapid rate driven by the
           transfer of heat