490. originate in/from(=begin)起源于,由..引起

489. made to order 定做的(衣服)

488. (be) in order(=acceptable)合适的,恰当的

in order 井井有条,处于良好状态; out of order(=in bad condition)出毛病,发生故障

487. be opposite to 与…相反的

486. be opposed to… 反对…

485. in one’s opinion 按某人的看法

484. be of the opinion 持有…的看法

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

482. (all) by oneself 独自(没有别人帮助)

481. once and for all =once and forever永远地 all at once (=suddenly, now) 立即,马上

once in a while (=occasionally) 偶尔 (just) for once 就这一次