Euxanthone
[化] 优┷吨酮; 1,7-二羟(基)-9-氧杂蒽酮(请比较flavone黄酮)
🗣️ 情景例句
The woods are lovely, dark and deep,
林子迷人 漆黑而深邃
Old bees yield no honey.
老蜂不酿蜜。
The problem now facing humanity is: What is going to be done with all this knowledge?
用这些知识去做什么？