Dioxopiperidine
二氧代哌啶, 哌啶二酮
🗣️ 情景例句
We can learn a lot by asking.
我们到处问问会学到不少东西。
The path to glory is always rugged.
通向光荣的道路常常是坎坷不平的。
'Your sister will be here in less than an hour and we must be at the station to meet her.
“再有不到一个小时你姐姐就要到这儿了，我们得去车站接她。