With the rapid process of urbanization, the interaction between cities and the biological circle as well as the resources on the earth have become more and more strong.
随着城市化进程的加速，城市的有机系统与地球大生物圈和资源体系之间相互作用也日益深入，日益扩展。
You can see more nighttime imagery of cities and learn about techniques that astronauts use to photograph them in the Earth Observatory feature Cities at Night.
如果想观看更多的城市夜景，或了解宇航员拍摄它们所用的技术，可以浏览地球大关的《城市夜景》系列。
Sadly, Friends of the Earth South Africa believes nothing can be done to lessen the carbon footprint, despite the reassurances made by the various cities.
可悲的是，南非地球之友相信，尽管各个城市大派定心丸，却没有什么措施可以减少碳足迹。
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