单词	ortho ester
释义	ortho ester noun : an ester of an ortho acid especially : an ester RC(OR′)3 (as orthoformic ester) of an ortho-carboxylic acid Word History Etymology ortho entry 1
随便看	helium-3 helium-4 heliums helix helix angle helixes helixin helixometer hell hell bomb hell driver hell driving Hell Gate hell of a hell on hell on wheels hell or high water hell ship hell to pay hell week hell's bells hell-bent hell-bent (on or upon) hell-bent on or upon hell-bind

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