I'm tired and can't move my arms and legs as I want.

This textbook-style font is easy to read, isn't it?

The revised edition of this book has been published.

This government-established textbook is for teaching students about the country's history and culture.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

I didn't think he would come.

When I hear that song, old memories come to mind.