He is majoring in political science at university.

He is a renowned political scientist who has written many important papers.

We should avoid the politicization of sports.

It is not appropriate to politicize this issue.

He acted according to my instructions one by one.

He believes that 'money is everything in this world.'

In psychology, it is important to understand the mechanism behind human behavior.

We adopted the AA system to start a new project.

Bureaucracy plays an important role in the operation of the government.

Manorialism was one of the economic systems in medieval Europe.