He started a special exercise to strengthen his flexor hallucis longus.

This system transfers data using synchronous transfer mode.

Infrared astronomy plays a very important role in the study of the universe.

Infrared astronomy provides a new perspective on understanding the universe.

Understanding the concept of 'Ha-line conversion sounds' is important in learning Japanese.

What are the indications of that disease?

Sumi cleaned the room neatly.

He is cutting vegetables with a kitchen knife.

He was diagnosed with schizophrenia.

Countries around the world are caught up in an arms race.