Dioxopiperidine
二氧代哌啶, 哌啶二酮
🗣️ 情景例句
What college are you attending?
你在哪里上学？
An idle youth, a needy age.
少壮不努力，老大徒伤悲。
Oh, dear. I forgot to tell you. Would you like to come?
哎唷。我忘了告诉你。你愿意来吗？