ETOn.工程试验指令ETabbr.东部时间（=Eastern Time)abbr.外星人（=extraterrestrial）ethynyl carbinol乙炔基甲醇ethyl boric acid[化] 乙基硼酸(基表示取代OH)ethyl phenacetin乙基非那西汀ethyl isocyanate异氰酸乙酯etrohysterectomy下腹子宫切除术ethenyloxyethene乙烯醚(吸入麻醉药)ethyl dirazepate地卓乙酯<抗焦虑药>ethotrimeprazine乙基异丁嗪ethyl levulinateγ-戊酮酸乙酯ethyl hexanediol驱蚊醇