Piperazine
n. 哌嗪\\n[化] 哌嗪
🗣️ 情景例句
She's never been happier.
她从来没有像现在这样快乐过。
John is not forty-five yet,is he?
约翰不够45岁,是吗？
Lights were blazing and men were running here and there: they had just discovered that a prisoner had escaped.
他们刚刚发现有一个俘虏跑了。