Activity cost
[经] 效率成本, 活动成本
🧩 词语组成解析
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
This is he speaking.
我就是。
I read 10 lettres.
我读了十封信。
I was being tested for a driving licence for the third time.
我第3次接受驾驶执照考试。