His behavior was abnormal.

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

I was moved by the beauty of nature.

Natural language processing is the technology that allows computers to understand and generate human language.

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

He emphasized his belief by saying, 'I believe in order to understand.'

She described the pain of a broken heart as tears.

I don't know a thing about him.

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.

We are planning to visit the nature reserve this weekend.