相关单词近义词 external 外来的, extracurricular 课外的, additional 附加的, optional 任选的, vocational 职业的反义词intramural, 校内的临近词Extradual, extra, extragalactic source, Extra early ripening, extraordinarily cold, extracellular signal, extramarital affairs, extracellular region, extraoral anesthesia, extragenic reversion, extra tax on profits, extra-far infrared相似词extraditable, extradite, extrajudicial, extramarital, extraneous, extranet, extraordinaire, extraordinarily, 返回 extramural