He is receiving treatment for obsessive-compulsive disorder.

The sternothyroid muscle is part of the neck muscles, connecting the sternum and the thyroid.

The border patrol is strictly monitoring to prevent illegal immigration.

He became obsessed with publicly-owned gambling enterprises and used up all his savings.

Kanna ran away.

He sharpens his sword every day.

He is an expert in computational linguistics and is involved in the development of artificial intelligence.

A nuclear submarine can travel underwater for a long time.

He is an expert in comparative linguistics.

Computational linguistics is the study of analyzing human language with computers.