He picked up the ray gun and fired it at the alien.

The Y chromosome carries the genes that determine maleness.

I inherited my X chromosome from my mother.

This new car is characterized by its streamlined design.

During the era of the Cold War, the world was divided into two major powers.

This world continues to give rise to innumerable changes.

This eternally unchanging truth does not change even as the times change.

His batting eye is amazing.

Draw a straight line.

Let's try to predict today's fortune.