Valerolactam
戊内酰胺
🗣️ 情景例句
Oh, it was no trouble.
哦 没什么麻烦。
The staff in this shop is very helpful.
这家商店的店员很热心。
That's not allowed. Once you are in here, listen to your teacher.
那是不允许的。一旦进来了，你们要听老师的话。