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
This method should be widely promoted.
这种方法应该推广。
Goodbye, it was nice meeting you.
再见，很荣幸认识你。
Hello, Lily! How are you today?
喂，莉莉，你好。