He tends to hold onto past failures.

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

This museum exhibits a collection of rare ulexite.

The Socialist Republic of Vietnam is located in Southeast Asia.

Mr. Sekigami bought a necklace for his wife’s birthday.

He shot an arrow at the target.

This cloth is one shaku square.

He divided the tree and made firewood.

He is an expert in analytical mechanics and deeply understands its theory.

He was promoted to the chief operating officer of the company.