The regional landscape is? At and was once rich in wet-lands and salt marshes that have been mostly destroyed by decades of urban development.

当地的地势平坦，曾经富饶的湿地和盐碱的沼泽，均毁于近几年的城市化。

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With the rapid development of the economy and urbanization, the regional characteristics of the urban air pollution in China has become dominant, and has attracted more attentions than before.

快速的城市化进程造成我国城市大气环境污染的区域性特征日益显著并受到关注。

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Reasonable urban system's structure is framework of regional economy, it is also nucleus and great engine to prompt the development of regional economy.

合理的城镇体系结构是区域经济的骨架，更是带动区域经济增长的极核和强大引擎。

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He became a full-time "urban naturalist" for the Audubon Society and played a key role in the development of metropolitan Portland's regional plan for natural areas.

CNN: A walk on Portland's wild side