The frontiers of urban ecological research include: Industrial Ecology, Built Ecology and Life Support System Ecology.

城市生态学的前沿研究领域形成三个方向：产业生态学、人居生态学与城镇支持系统生态学。

youdao

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.

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。

youdao