Ben shu jie shao le di qiu huan jing de jie gou yu te zheng, sheng tai xi tong yu sheng tai ping heng, ren lei huo dong yu huan jing, huan jing wu ran yu sheng tai po huai, huan jing guan li yu huan jing jiao yu, wu ran fang zhi yu sheng tai huan jing jian she deng nei rong.