Verp
[医][=ventricular effective refractory period]心室有效不应期
🗣️ 情景例句
Tomorrow morning it is.
确定是明天早晨。
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。
I'm not guessing，I really know.
我不是在猜想，我真的知道。