Polycoumarone
[化] 聚香豆酮; 聚氧杂茚
🗣️ 情景例句
Learning any language takes a lot of effort.
学习任何语言都需要花费很多努力。
There aren't any other worms for me to play with. I'm the only worm here.
此地没有和我玩的虫虫。这里只有我一条而已。
It was getting very windy in the hills.
山上还刮起了大风。