Piperidine
n. [化]哌啶,氮杂环己烷
🗣️ 情景例句
It's a serious matter for a lot of us.
对我们许多人来说这可是个严重的问题。
Nothing is impossible to a willing mind.
世上无难事，只怕有心人。
have been frightened out of their wits by giant fish bumping into them as they work.
他们曾在工作时被撞到他们身上的大鱼吓得惊惶失措。