He is an excellent computer user.

He has no knowledge about anal sex.

This area is still undeveloped and rich in nature.

This area is still undeveloped, and nature is abundant.

This river is the border between two countries.

It is said that this medicine has mystical properties.

He looks like he's about to cry any moment now.

What are you doing now?

He started a new project to study hemp.

He described the book.