Japan has introduced an import quota system to protect domestic industries.

The discussion about the regional system in Japan is not over yet.

Absolute monarchy refers to a political system where all the power of a nation is concentrated in one monarch.

When my stomach hurts, I always take an antacid.

The United Kingdom is a constitutional monarchy.

Oligarchy is a political system where a few powerful people rule the country.

Proportional representation is an important system to ensure the fairness of elections.

My company has introduced a layoff system.

He is doing special exercises to strengthen his depressor muscle.

Primitive communism is one of the initial forms of human social organization.