Changes in the social system inevitably occur with time.

Social justice means that all people are treated equally.

He is deeply interested in social issues.

He used to be a member of the Chinese gang.

He experienced the harsh reality of the underbelly of society.

He is spending a lot of time on experimental research.

This compound has a tetrahedral molecular geometry.

That theory is unscientific and has no evidence at all.

He is an expert in computer science.

The Ministry of Education is responsible for Japan's educational policy.