General relativity is a theory of physics proposed by Einstein.

Special relativity is one of the fundamental theories of physics.

This area is seriously contaminated with radioactive isotopes.

My father was diagnosed with ankylosing spondylitis.

In organic chemistry, pyruvic acid plays an important role.

His father fell into a persistent vegetative state due to a traffic accident.

Basic oxides react with acids to produce salt and water.

This area is affected by radioactive fallout from past nuclear tests.

It is important for us to respect cultural diversity and understand each other's differences.

The study of filterable pathogens is an important part of virology.