Dihydroketoacridine
吖啶酮
??? 情景例句
The annual school sports meet is held in March.
每年一次校運會在三月份舉行。
He who is afraid of asking is ashamed of learning.
害怕問者恥于學。
It was the first joy I had known for years.
我豁然開朗了。這是我多年來第一次感到高興的事了。