Research cost
[经] 研究成本
🧩 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
cost
[kɔst]
n. 价钱，代价;花费，费用;牺牲;[用复数][法律]诉讼费;
vi. 价钱为，花费;估计成本;
vt. 付出代价;估价;使丧失;使付出努力;
🗣️ 情景例句
You can't take her promises seriously, she never keeps her word.
她答应的事不用当真，她说话从来不算数。
They won't listen, so don't waste your breath telling them.
他们听不进去，不必和他们多费口舌了。
It contained $300 in pennies.
他坚持要店员点清那些硬币后他才离去。