Piperidine
n. [化]哌啶,氮杂环己烷
🗣️ 情景例句
And the telephone number is five five five…three oh nine oh. Thank you.
电话是555-3090。谢谢。
Why are you wearing my sweater?
你为什么穿着我的毛衣？
At the same price?
价钱一样吗？