An antiparticle is a particle that pairs with a matter particle.

Please cut this pizza in half.

He is enriching his sentences by using antonyms.

I own the copyright of this book.

He resisted his parents' orders.

Don't forget to bring your mess tin when you go camping.

The radius of this circle is 5 centimeters.

He is our squad leader.

Let's define the range of this project.

This book is out of copyright, so you can copy it freely.