This main song is my favorite.

He showed his true colors under difficult circumstances.

He is a person who speaks the truth.

The American red wolf is one of the endangered species.

The whooping crane is an endangered species, and it is difficult to see its beautiful figure.

My dream is to live in the United States of America someday.

The American continent is where diverse cultures and nature coexist.

I attended an awards ceremony yesterday.

It's difficult to solve this formula.

We attended his memorial service.