基本解释[医] 乙基同根派生 aethyl相关词英汉例句aethyl biscoumacetate 新双香豆素aethyl chaulmoograte 大风子酸乙酯aethyl chloride 氯乙烷aethyl mercaptan [医] 乙硫醇aethyl parabenum 对羟苯甲酸乙酯aethyl更多例句