It takes time to solve this complex problem.

He is the vice president of our company.

The thylacine is an extinct carnivorous marsupial native to Australia.

He declared war against the enemy country.

He suddenly declared war.

The koala is a symbolic animal of Australia.

This area is affected by multiple contamination.

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

The kangaroo is a species native to Australia.

He carved a gourd and made a beautiful vase.