The snowy owl is a species of white owl that lives in the Arctic region.

String theory is a branch of theoretical physics that proposes the existence of one-dimensional strings as the fundamental building blocks of nature.

The sand martin migrates to\/from Brazil during the winter.

The fruit fly is a common pest in orchards and fruit plantations.

Of the two, either you study for the exam or you fail.

The flag of the quinas is a national symbol of Portugal.

Altitude sickness can occur at high altitudes due to oxygen deficiency.

Altitude sickness can cause dizziness and shortness of breath.

She suffered from altitude sickness during the mountain trip.

She suffers from altitude sickness when traveling to high-altitude regions.