He has a deep interest in astronomy.

Radio astronomy plays a very important role in understanding the universe.

Infrared astronomy provides a new perspective on understanding the universe.

In ancient Chinese astronomy, they used the earthly branches to express time and direction.

Please hurry up because we don't have time.

His poetry depicts emotions with beautiful expressions.

He has no sense of direction, so he gets lost even when he looks at a map.

He solved the problem using a new method.

He is not good at expressing his feelings in words.

This ancient artifact is very valuable.