His presence serves as a deterrence to war.

The bathroom in my house is very spacious.

Birds need feathers and wings to fly in the sky.

A yoctosecond is one trillionth of a trillionth of a second.

He always tries to run away to avoid problems.

He decided to appeal to the court to protect his rights.

Discrete mathematics is an important field that forms the basis of computer science.

He is majoring in applied mathematics at university.

He is passionate about researching pure mathematics.

He is a world-famous mathematician.