Pbf
[医][=peripheral blood flow]外周血流（量），末梢血流量
🗣️ 情景例句
This is fun.
很有意思。
We are very interested in your printed pure silk scarves, could you give us some idea about your price?
我们对贵方的印花真丝围巾很感兴趣，请介绍一下贵方的价格好吗？
I had a letter from my sister yesterday.
昨天我收到了姐姐的一封信，