He is writing a thesis on monotheism.

Sufficient caution is necessary when handling radioactive materials.

He is always facing difficulties, just like the proverb 'clouds over the moon, wind in the flowers'.

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.

He feels dizzy when he stands up suddenly due to orthostatic hypotension.

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.