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
It's a pleasure to meet you too, Mrs. Green. I've heard so much about you.
格林太太，我也很高兴见到您。早就听说过您。
Do you usually lenrn Japanese on Saturday?
你通常在星期六学日文吗？
but it does mean that noise is less dangerous than, say,
但它确实说明，噪音的危险性--比如说--