Piperidine
n. [化]哌啶,氮杂环己烷
🗣️ 情景例句
She wears too much make-up.
她妆化得很浓。
I'm hoping to spend a few days in the mountains.
我正在希望到在山上过一些天。
We have this problem every year.
我们每年都碰到这类问题。末了，