- Humans have used compasses since ancient times.
The principle of the compass is to use magnetism to sense the direction of the earth's north and south poles.
I bought a small compass.
As long as you understand the physical principles of the compass, you can make a compass in a very simple way.
The bookstore sells a variety of compasses and the prices are very cheap.
I learned how to use the compass when I was in elementary school.
The compass is a very useful tool when exploring.
I usually take a compass to climb mountains.
The compass cannot predict the climate.
A compass is a tool used to measure direction.