Polycoumarone
[化] 聚香豆酮; 聚氧杂茚
🗣️ 情景例句
He speaks French and English with equal ease.
他说法语和英语都一样自如。
He is good at reading and writing, but he wishes he knew how to understand and speak better.
他的阅读和写作是强项，但他希望知道怎样去理解和说得更好。
Sorry. I haven't seen it anywhere.
对不起，我没见过。