Einstein's theory of relativity forms the basis of physics.

I need your help.

In ancient times, ministers had to stand before the emperor to report important matters.

All hands, prepare for battle!

He is training at the monastery.

He is an expert in algebraic geometry and has written many papers in the field.

Topology is a branch of mathematics that studies the properties of space.

He has an excellent relative pitch, and can play any song immediately.

The contest for this trophy is very intense.

They were caught up in the struggle for that position.