Etiocholanedione
本胆烷二酮
🗣️ 情景例句
Which tourist attractions are the best?
哪一个旅游景点最好？
It is a sad house where the hen crows louder than the cock.
母鸡司晨家不兴。
The clouds had come down so suddenly we had no warning.
乌云突然出现，我们丝毫没有觉察。