Special relativity is one of the fundamental theories of physics.

I am majoring in auditory phonetics at university.

Articulatory phonetics is a study about the production of speech sounds.

Acoustic phonetics is the study of the physical properties of speech.

This software has forward compatibility.

This software maintains backward compatibility.

He is receiving treatment for obsessive-compulsive disorder.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

The rainbow lorikeet is known for its vibrant colors.

These two software have complete interchangeability.