This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

He has a strong interest in supernatural phenomena.

Understanding the difference between a natural person and a corporation is important in studying law.

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

His behavior was unnatural.

His behavior was abnormal.

Natural numbers start from 0 and continue as 1, 2, 3, 4, 5, 6, 7, 8, 9.

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

We must strive to protect the natural environment.

Our town suffered significant damage due to a natural disaster.