单词	firedamp
释义	firedamp noun fire·​damp ˈfī(-ə)r-ˌdamp  : a combustible mine gas that consists chiefly of methane also : the explosive mixture of this gas with air Word History First Known Use 1662, in the meaning defined above Medical Definition firedamp noun fire·​damp -ˌdamp  : a combustible mine gas that consists chiefly of methane also : the explosive mixture of this gas with air compare black damp
随便看	root canal root cap root celery root cellar root circle root climber root collar root crop root cutting root determinative root disease root division root fly root for root fungus root gall root graft root hair root house root in root kit root knot root line root maggot root metaphor

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