考研考前必看高频词组（25）

　　481 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

　　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 putbring 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 infrom起源于,由..引起

　　491. on the outskirts 在城郊

　　492. oweto 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