His research is mainly about the ancient Chinese Kyūjitai form of 国号.

What is his regnal name?

When I hear that song, old memories come to mind.

This was truly an unexpected result.

I am surprised by this unexpected event.

His thoughts were as we expected.

He likes to take a walk in the park at dusk.

Zhuyin fuhao is a phonetic notation used in Taiwan.

The Schläfli symbol is a part of geometry, used to represent the shape of polyhedra.

He is the type of person who thinks it's a moonlit night if it's bright, so he only has a one-sided perspective.