基本解釋雙乙烯酮同根派生 diethenone相關(guān)詞英漢例句Keywords dehydroacetic acid;diethenone process;ethyl acetoac etate process;triethylene diamine; 關(guān)鍵詞脫氫醋酸;雙乙烯酮法;乙醯乙酸乙酯法;三乙烯二胺;diethenone更多例句