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once and for all = once and forever永远地 all at once 立即，马上 once in a while 立即，马上 once in a while 偶尔 for once就这一次 by oneself 独自 operate on sb. 给某人做手术 operation n.come/ go into operation 开始运转 put/bring sth. into operation 使投产，运转 be of the opinion 持有的看法 in ones opinion 按某人的看法 be opposed to... 反对 be opposite to与相反的 in order 合适的，恰当的in order井井有条，处于良好状态;out of order 出毛病，发生故障 made to order 定做的 originate in/from 起源于，由引起 on the outskirts 在城郊 owe...to 把归于 on ones own 单独 of ones own某人自己的 keep pace with 跟齐步前进 go to great pains = take pains下功夫，努力 part with 舍弃，卖掉 participate in 参加 particular about 讲究，挑剔 in particular 特别是，尤其 passion for 对的热爱，热情 | 
