natural drainage systems
... natural immune systems 生物免疫系统 Natural drainage systems 自然排水系统 ; 自然排水体系 wastewater natural treatment systems 污水自然净化系统 ...
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生态型排水系统是指遵循自然生态系统和工业生态系统的原则、符合物质闭环流动循环的经济模式。
Ecological drainage system is referred to following the principles of natural and industrial ecologic system and cycling economic pattern with which substances cycle with closed loop.
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