He decided to start a multi-level marketing business.

We play golf at the country club on weekends.

This compound mainly consists of cyclotridecane.

The children were playing by kicking a ball in the park.

He was arrested for streaking.

He once went streaking during his college days.

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.