His sociability is an important factor for his success as a leader.

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 can't learn from his mistakes, just like the proverb 'not returning to the water jar after drinking'.

Complex analysis is a branch of mathematics that studies functions of complex numbers.

I'm sorry, but I don't speak Japanese.

I'm a Muslim, so I fast during Ramadan.