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.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

The proverb 'If you want to shoot the general, first shoot his horse' means that to achieve a big goal, you should start with small steps.

My grandmother drinks Panax ginseng tea every day.

Pentathlon is a competition that tests both physical strength and technique.

He participated in the Olympics as a pentathlon athlete.