Operational research
出国 Abroad[经] 运筹学
🧩 词语组成解析
research
['risɝtʃ]
n. 研究，追究;探讨，探测;调查;探索;
vi. 做研究;探究;（从市场调研中）得出所预测的结果;
vt. 从事…的研究，为…而做研究;
re(again)+search(to go round)→研究；调查
🗣️ 情景例句
Her surgery needs quite a lot of money.
她的手术得花不少钱。
Don't pass up a golden opportunity.
勿失良机。
Why don't you borrow some? Do you have a friend who might lend you some?
那为什么不去借点首饰呢？你有没有朋友可以借给你首饰呢？