ETN(=erythrityl tetranitrate) 赤藓醇四硝酸酯ETabbr.东部时间（=Eastern Time)abbr.外星人（=extraterrestrial）ethyl carbostyrile乙基喹诺酮ethyl benzoic acid苯基乙基丙二酸二乙酯et sepultus est.被掩埋入土。ethylcrotonanilide乙巴酰苯胺ethyl silicone oil[化] 乙基硅油ethyl butyl ketone乙基丁酮ethylidene urethan亚乙基尿烷, 亚乙基二氨基甲酸乙酯etymologic meaning词源义etiologic fraction病因分数Ethmoid sinusotomy筛窦切开术