In this experiment, you can observe a chemical reaction.

This substance undergoes a chemical change when heat is applied.

Japanese is a language with few declensions.

He deeply believes in the principles of socialism.

He is an expert in sociology.

After graduating from university, you have to prepare to enter the real world.

Maintaining social order is the responsibility of all of us.

He understands his responsibilities as a working adult.

Actions that go against social norms are not allowed.

We should think deeply about the reform of the social security system.