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
You're growing so fast, Michelle.
长得太快了， Michelle。
Circumstances are therulers of the weak, instrument of the wise.
弱者困于环境，智者利用环境。
That's all right. Thank you. Goodbye!
好的。谢谢你，再见！