natural system短语¹⁴⁴⁹⁷²⁺² 基本例句 自然分类系统,自然分类法 The Pavilion of City Being regards the city as an artificial life established on the basis of a natural system and comprising complicated activities of society, economy and culture. 生命馆把“城市”本身视做一个生命体，展示其内在的结构规律；地球馆注重探讨“人类、城市、星球是共赢、共生的关系”； expolucy