作为国际城市区域中的二级城市不仅在全球城市体系中发挥作用，同时也在国际城市区域中担任重要的功能。

This paper argues that a second-tier city in a global city region not only plays important functions in the global urban system but also within the global city region.

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随着世界各地城市市区的不断扩大，垃圾填埋场的环境影响和植被重建已成为全球所共同面临的一个相当紧迫和突出的环境问题。

As many cities are constantly expanding around the world, the environmental effect and the revegetation of landfill have become very urgent and outstanding problems.

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