Piperidine
n. [化]哌啶,氮杂环己烷
🗣️ 情景例句
No problems. Here's your passport, and here's your money. Have a nice day, Mr. Lu.
没问题。这是您的护照，还有您的钱。祝您愉快，陆先生。
What do you plan to do tomorrow?
你计划明天做什么？
This figure rises to a staggering 60% of men in their sixties.
而到60岁这个年龄段，这个数字上升到令人惊愕的60%。