He is doing special exercises to strengthen his flexor digitorum profundus.

General relativity is a theory of physics proposed by Einstein.

Special relativity is one of the fundamental theories of physics.

He is good at reading traditional Chinese characters.

He is good at reading simplified Chinese characters.

The pineal body is a small endocrine gland located in the brain.

I have experienced astral projection.

He said he had experienced an out-of-body experience.

Chloroplasts are the locations where photosynthesis occurs in plant cells.

Their teamwork was in complete harmony, and it was beautiful.