Levulinamide
4-氧(代)戊酰胺
🗣️ 情景例句
He's living on easy street.
他过得很富裕。
You should take advantage of it.
你应该好好利用这个机会。
I know it's not necessary. I want to do it.
我知道不必这样，可是我愿付？/span>