ETIM东突分子ETabbr.东部时间（=Eastern Time)abbr.外星人（=extraterrestrial）ethyl ketone methyl甲乙酮etension experiment拉伸试验ethyl styryl ketone苏合香烯丙酮Ethylnorgestrienone乙基诺孕烯酮ethyl triazoacetate叠氮基乙酸乙酯ethyl chaulmoograte晁模酸乙酯ethyl orthoformiate[化] 原甲酸乙酯Ethnographic of Law法律民族志ethanedithioic acid二硫代乙酸ethylidene dihalide亚乙基二卤