The bird is making a nest in the tree.

He works at the Ministry of Health, Labour and Welfare.

He is a very quiet person.

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.