单词	acetyltannic acid
释义	acetyltannic acid noun ace·​tyl·​tan·​nic acid ə-ˌsē-tᵊl-ˈta-nik- : a yellowish white or grayish white powder obtained by the acetylation of tannin and used as an intestinal astringent Word History Etymology acetyl + tannic First Known Use 1875, in the meaning defined above
随便看	dragoon bird dragoon into dragooned dragooned into dragooner dragooning dragooning into dragoons dragoons into dragos dragrope dragropes drags drags (out) drags down drags into drags one's feet drags out dragsaw dragshoe dragshovel dragsman dragsmen dragstaff dragster

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