He is suffering from depression.

The fluorescent lamp broke, and the room became dark.

He was imprisoned as a political offender.

His heart became empty.

His heart felt like emptiness.

I work in the sales department.

He likes the character named Liang.

Please take this medicine one sho at a time.

We transport a large amount of goods every day.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.