Natural selection plays an important role in the evolution of organisms.

We must strive to protect the natural environment.

He is conducting research on natural phenomena.

He has a deep interest in natural history.

He has a deep interest in natural history.

Our town suffered significant damage due to a natural disaster.

In philosophy, natural law refers to the moral laws of the universe.

The equilibrium length of this spring is 5 centimeters.

He prefers natural foods.

This wood may spontaneously combust if the humidity is high.