Levulinamide
4-氧(代)戊酰胺
🗣️ 情景例句
I know a good spot for-
我知道一个好地点干-
When is he expected to be back?
他什么时候回来？
Well,you mustn't play in the road.It's dangerous. A car may hit you.
嗯，你不可以在路上玩球。那是很危险的。汽车会撞着你。