|
470．nothing but 只有，不过而已 471．to say nothing of 更不用说 472．do sth. at short notice 只给很少时间准备 473．until further notice 在另行通知前 474．take notice of 注意 475．object to 反对 476．objection to 反对 477．on occasion 不时地，必要时 478．by occasion of 由于 479．occupy oneself with 忙于 480．it occurs to sb. that... 某人想到 481．once and for all = once and forever永远地 all at once 立即，马上 once in a while 偶尔 for once就这一次 482． by oneself 独自 483．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 484．be of the opinion 持有的看法 485．in ones opinion 按某人的看法 486．be opposed to... 反对 487．be opposite to与相反的 488． 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 | 
