Alkenes play a very important role in organic chemistry.

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.

Early rising is worth three pence.

He is not an ordinary human.

He planed the wood and made a model airplane.