单词	tungstate
释义	tungstate noun tung·​state ˈtəŋ-ˌstāt  : a salt or ester of a tungstic acid and especially of H2WO4 Example Sentences Recent Examples on the Web The mine was once used to produce an iron manganese tungstate mineral for craft light bulb filament. Dave Quinn, PEOPLE.com, 25 July 2019 Word History First Known Use 1800, in the meaning defined above
随便看	hard going hard goods hard grass hard ground hard hat hard hats hard knocks hard labor hard lay hard lead hard lines hard liquor hard liver hard liver disease hard maple hard of hearing hard oil hard on someone's or something's heels hard palate hard pass hard paste hard patch hard pear hard pine hard put

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