The housing of this electronic device is very sturdy.

I strive for body care by doing moderate exercise and eating a balanced diet every day.

I saw a flying object in the sky.

I am majoring in biophysics at university.

I am majoring in physical chemistry at university.

In set theory, the symmetric difference indicates the difference between two sets.

He is immersed in the study of the fasiculus arcuatus.

He is majoring in linguistics.

He has a deep interest in astronomy.

Electromagnetism is a part of physics that studies the interaction between electricity and magnetism.