He is an expert in planetary science.

Humanities is an academic field that studies human culture and society.

He understands the importance of learning.

He is majoring in psychology.

Gaku is my best friend.

He has a deep interest in archaeology.

He is good at playing the guqin.

I am learning Old English.

This antique clock is a keepsake from my grandfather.

This old document is very important for understanding our history.