Piperazin
n. 哌嗪
🗣️ 情景例句
He is behind the rest of the class in reading.
他在阅读方面不如班上的其他同学。
To scream for his breakfast
想吃早餐而大喊大叫。
I'm planning to do a special study of satellites next term.
我计划下学期就卫星的问题做些特别的研究。