Euxanthon
优吨酮, 1, 7-二羟(基)夹氧杂蒽酮
🗣️ 情景例句
Hello, my name is Susan and I am calling to confirm my reservation.
喂，你好，我叫苏珊，我大电话确定我的预定。
Where were you yesterday afternoon?
你昨天下午在哪儿？
It's not your fault.
那不是你的错。