Piperidine
n. [化]哌啶,氮杂环己烷
🗣️ 情景例句
Please have two window seats placed aside for us.
请为我们保留两个靠窗口的位子。
He is truly happy who makes others happy.
真正幸福的是使人幸福的人。
winkling out hidden meanings, super-imposing new ones,
挖掘其隐晦的含义，增添新的含义，