He received training as a paratrooper.

There are a few problems.

Let's calculate so that all numbers become equal.

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.

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.