自然界里生活着数百万种的生物,它们之间相互联系。相互制约,相互影响。相互作用,构成了一个复杂平衡的生态系统。其中每一个因素一方面受到周围其它因素的影响,另一方面又反过来影响其它因素。在环境学领域里,人们发现,周围生活的环境是有层次的,如果说大自然是人类的第一环境。而城乡和建筑是人类的第二环境,人们生活的 There are millions of creatures living in nature, and they are related to each other. Restrict each other and influence each other. Interactions constitute a complex and balanced ecosystem. Each of these factors is influenced by other factors in the surrounding area on the one hand, and in turn affects other factors in turn. In the field of environmental science, people have found that the surrounding living environment is hierarchical, if nature is the first human environment. Urban and rural areas and buildings are the second environment for human beings. People’s lives