This virus can be transmitted from human to human.

He is living as one person.

This park is overflowing with people.

This park is always bustling with people.

Hominidae is a family that includes part of the primates, including humans, chimpanzees, and gorillas.

I often go to one-man karaoke sessions on weekends.

The one-humped camel lives in the desert.

The rain continues to fall, and there is a risk that the river will overflow.

We had a picnic in the park.

The human immunodeficiency virus destroys the immune system, causing the body to lose its ability to fight disease.