基本解释雙乙烯酮同根派生 diethenone相关词英汉例句Keywords dehydroacetic acid;diethenone process;ethyl acetoac etate process;triethylene diamine; 關鍵詞脫氫醋酸;雙乙烯酮法;乙醯乙酸乙酯法;三乙烯二胺;diethenone更多例句