单词	touchmark
释义	touchmark noun touch·​mark ˈtəch-ˌmärk  : an identifying maker's mark impressed on pewter Word History First Known Use 1792, in the meaning defined above
随便看	hydrogen-ion concentration hydrogenase hydrogenases hydrogenate hydrogenated hydrogenates hydrogenating hydrogenation hydrogenations hydrogenic hydrogenide hydrogenisation hydrogenisations hydrogenise hydrogenised hydrogenises hydrogenising hydrogenium hydrogenizations hydrogenize hydrogenized hydrogenizes hydrogenizing hydrogenolyses hydrogenolysis

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