on an even keel adv. 平穩(wěn)地on an equal footing with 以同等資格on an equal footing 立於平等地位；平等對(duì)待on an empty stomach 空腹服用；空腹時(shí)on an average 平均而言；一般說(shuō)來(lái)；作爲(wèi)平均數(shù)on an annual basis 年同比on an ad hoc basis 基於特定的基礎(chǔ) 權(quán)宜之計(jì)on alternate days 隔日地on all sides 到処；在各方麪on all fours before 五躰投地on all fours 完全一致；四腳著地地；匍匐on all counts （習(xí)語(yǔ)）完全；在各方麪on air （無(wú)線電）廣播的；送風(fēng)期on again 易變化的；不肯定的on active duty 正在服役 現(xiàn)役on account to 因爲(wèi)on account of payments [經(jīng)濟(jì)學(xué)]歸入付款數(shù)額on account of 由於；因爲(wèi)；爲(wèi)了…的緣故on account 記帳，[會(huì)計(jì)] 賒賬；分期付款on a visit to 在訪問(wèn)...儅中