Piperazin
n. 哌嗪
🗣️ 情景例句
I retired because... I wanted to be with my family.
我退休是因为……我想和全家人在一起。
Are most of the lakes located in the north central region?
大多数湖位于向北中央的区域吗？
Yes, I have.
是的，我刚拍完。