The broad sense of nature includes the whole objective material world including human society. The material world exists and changes in a natural way. Man's consciousness is also the material world that happens in a natural way. Human and human consciousness is the highest product of the development of nature. The material world is systematic, complex and infinitely diverse. It includes not only the material world known by human beings, but also the unknown material world.

The narrow sense of nature refers to the material world different from human society. That is, the inorganic and organic fields studied by natural science. The relationship between nature and human society: nature is like cream on the edge of bread, while human society is bread. Society refers to science and technology, humanities, greening, competition and commerce, which are virtual things, while nature is real things.

Source: @killakph