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.

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.