After school, we study at the library.

He sneaked into the school through the back gate.

He suffered a minor contusion on his occiput.

The trailing edge of this airplane has a very unique shape.

His dream is to fly in the sky in a hot-air balloon.

He lives on a tropical island.

The thermosphere is a part of the Earth's atmosphere, located above the stratosphere and the mesosphere.

My friend contracted Q fever.

He is studying thermodynamics in depth.

Zika fever is an infectious disease transmitted by mosquitoes.