Piperidine
n. [化]哌啶,氮杂环己烷
🗣️ 情景例句
Dear Mr. Lee.
亲爱的李先生。
The athletes competed for the honor of their country.
选手们为了国家的荣誉而互相竞赛。
Yes, we might have to do that.
是呀，恐怕只有这么做了。