Polycoumarone
[化] 聚香豆酮; 聚氧杂茚
🗣️ 情景例句
I plan to get help
我打算争取
When is the most convenient time for you?
你在什么时间最方便呢？
The trainer stands in front of the elephant holding a long stick with a sharp metal point.
驯练员手持一根有锋利金属尖头的长棒，站在象前。