Dioxopurine
黄嘌呤
🗣️ 情景例句
I am so excited. Mother!
我好兴奋， 妈妈！
I still have to fill 16 hours in my major.
我必须重修主修科目16小时。
If you are younger, and ina solid financial position,
如果你年轻一些，并且经济状况可靠，