Hexanedione
[化] 己二酮
🗣️ 情景例句
Give me a discount.
给我打个折吧。
He tells me is a city boy, and this is his first time to live in a camp like this.
他说他是一个都市男孩，这是他第一次过这种野营生活。
How old is he?
他多大年纪了？