Doses
v. 服药（dose的三单形式）
🗣️ 情景例句
Yes, it was delicious.
对， 味道非常好。
The two parties involved in a contract have the obligation to execute the contract.
合同双方有义务履行合同。
Work on it had begun before my sister left.
这栋房子在我姐姐离开之前就已动工了，