Studying the history of the Imperial Examination is important for understanding the past of our country.

Maintaining oral hygiene is very important for overall health.

He is working at the pithead.

Sexual intercourse is one of the basic human desires.

They were having sex in secret.

When I see the statues of the Five Wisdom Kings, I feel calm.

His dream is to catch a black marlin.

The Newfoundland wolf is said to be an extinct species.

The grey matter of the brain is the central part of information processing.

There are many Trifolia repens blooming in my garden.