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
489.made to order 定做的
490.originate in/from 起源于,由引起
491.on the outskirts 在城郊
492.owe...to 把归于
493.on ones own 单独
494.of ones own某人自己的
495.keep pace with 跟齐步前进
496.go to great pains = take pains下功夫,努力
497.part with 舍弃,卖掉
498.participate in 参加
499. particular about 讲究,挑剔
500.in particular 特别是,尤其
501. passion for 对的热爱,热情
502.be patient with 对耐心
503.pay for 赔偿,付款,报偿,处罚
504.payfor 付的钱
505. at peace with 与和睦相处
in peace 安静,平安
506.peculiar to... 特有的,独具的
507.penalty for 对的处罚,罚金
508.perform on the piano 演奏钢琴
509.persist in 坚持,固执
510.in person 亲自,当面
511.in place 放在应放的地方
512.in place of 代替
513.take pleasure in 喜欢做某事
514.be on the point of doing sth. 刚要去做