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.

This document contains environment-dependent characters.

The United Nations Environment Programme is providing solutions to global environmental problems.

Will you marry me?

"Do you want to have a meal? Take a bath? Or choose me?" she said jokingly.

She used to be a prostitute, but now she has started a new life.