Prevention of sexually transmitted diseases is very important to protect your own health and that of your partner.

He is known as an anti-establishment activist.

He has a collection of taxidermy.

Einstein's theory of relativity forms the basis of physics.

The topography of this area is very complex.

Her spontaneity brought vitality to the team.

He is studying old written materials.

His inherent nature became clear.

The state control in response to the emergency has been strengthened.

The government began to control the actions of citizens on the grounds of an emergency.