Dioxopiperidine
二氧代哌啶, 哌啶二酮
🗣️ 情景例句
Do you know when the bus for the Summer Palace leave?
你知道到颐和园的车几点开吗？
This knife is dirty.Would you bring me a clean one,please?
这把刀子是脏的.请你给我干净的一个,好吗？
the study was known as Project Anehin.
安内英工程"。