Lactonic ketone
[机] 内酯
🧩 词语组成解析
a. [化]内酯酸的, 无水氢氧酸类的
ketone
['ki:toʊn]
n. 酮;
🗣️ 情景例句
By the way, I'm Richard.
噢，我忘了说，我叫Richard。
He is wise that knows when he's well enough.
知足的人是聪明的人。
I'll be there next Monday at noon.
下个星期一中午吧。