He is studying the history of African Americans.

The parasympathetic nervous system helps our body to relax and conserve energy.

He is interested in geometrical shapes.

He is conducting research on historical kana usage.

He often thinks about problems from a humanitarian perspective.

His company is facing the risk of a hostile takeover.

That plan is too impractical, it's difficult to implement.

His plan was so unrealistic that no one could believe it.

This painting depicts a surreal landscape.

This design has a unique charm because it is asymmetrical.