He is my biggest enemy.

His advice was very practical.

His target-like way of thinking is hard to understand.

Fundamental interaction is one of the most important forces in physics.

The one-eyed goblin was dancing in the forest.

He always proactively suggests new ideas.

My younger sister is twenty-two years old.

This old operational amplifier still works accurately.

Clifford algebra is a branch of mathematics, and it has a close relationship with physics.

Our project is scheduled to be completed on the twentieth day of the month.