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
Well, help me serve, Robbie.
好 帮我分菜 Robbie。
As far as I'm concerned, you can stay out all night.
对我来说，你可以整晚都在外面。
You'd better go to bed earlier tonight, if you can.
如果可能，你今晚最好早点儿睡觉。