天然气水合物 tiānránqìshuǐhéwù natural gas hydrate Definitions Defs Origin Strokes Stroke Words Sentences Sents 天然气 天然氣 tiānránqì noun natural gas combustible gas found in underground rock formations or coal beds, used as fuel or raw material in chemical production水合物 shuǐhéwù hydrate hydrate; a hydrated compound
