因此，把城市当作一个社会—经济—自然复合的生态系统来研究就显得日益必要，这也是从生态学角度来研究城市问题的一种新的思维方式。
Therefore, it is very important to regard the cities, as the compound ecosystem of society - economy-nature, and it is also a new mode of thinking to study urban problems from the Angle of ecology.
稻—鸭—泥鳅复合生态系统的经济效益、生态效益和社会效益。
The study on ecological, economical and social benefits of rice-duck-loach complex ecosystem.
旅游生态学的主要研究对象是旅游生态系统，旅游生态系统是一个社会—经济—自然复合生态系统。
Its research subject is tourism ecosystem which is a compound ecological system of society, economy and nature.
吉林西部是一个典型的自然、经济和社会的复合系统，生态环境脆弱，土地沙化、碱化严重。
The western of Jilin Province is a typical compound system of nature, economy and society, with vulnerable eco-environment. The desertification and basification of the soil is serious there.
指出要在自然-社会-经济复合生态系统中全面权衡筑坝的利弊得失。
It is pointed out that the advantage and disadvantage of hydropower should be comprehensively evaluated in the compound ecosystem of nature, society and economy.
城市是由自然生态系统、社会生态系统、经济生态系统等构成的复合生态系统。
Cities are shaped by natural ecosystems, social ecosystems, economic ecosystems posed by complex ecosystems.
城市是由自然生态系统、社会生态系统、经济生态系统等构成的复合生态系统。
Cities are shaped by natural ecosystems, social ecosystems, economic ecosystems posed by complex ecosystems.
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