Strong interaction is one of the four fundamental forces in particle physics.

He is good at reading Chinese text.

I am busy with work during the day.

I work during the daytime.

He is researching the functions of the midbrain.

He was watching the television relay.

He was relaying the soccer match on TV.

My younger brother is currently attending middle school.

He is studying the history of Central Europe.

The role of the Jijū was to handle the affairs of the imperial court.