A 5-cell is a simple convex polytope in four dimensions.

He felt cognitive dissonance between his actions and beliefs.

Japan's exclusive economic zone plays a crucial role in the management and utilization of marine resources.

He believes that he has extrasensory perception.

In behavioral sciences, the use of metatools plays a crucial role.

He is writing a thesis on dialectical materialism.

It is important to distance yourself from antisocial forces.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

I have started learning Traditional Chinese.

I am learning Simplified Chinese.