Ack1
[计] 确认, 肯定, 奇肯定应答
🗣️ 情景例句
You should use 'officer' to address a policeman.
你应该用 'officer' 来称呼警察。
You've got to do something.
你一定要想办法。
We'd better not just talk; let's go to the river to bathe.
我们最好别光顾说了；咱们去河里游泳吧。