Hibiki forgot to bring his textbook.

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.

Today's temperature is 30 degrees.

He was peeling the apple skin.

It's difficult to handle this machine.

He obtained a copy of his family register at the city hall.

He is good at playing the electric guitar.