His hobby is astronomical observation.

The herald came to deliver a message from the king.

This old radio uses a vacuum tube.

He expressed his opinion in an indirect way.

I love canned tomato soup.

Every morning, I start my day by reading a daily newspaper.

He mastered the technique of grafting grapevines.

She had a beautiful headdress on her head.

In this company, it is a convention for new employees to greet their seniors.

Euclidean space is one of the basic concepts in mathematics.