现代上海是一个反差很大的城市。

Modern Shanghai is a city of contrasts.

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中国是一个很大的国家，所以城市间是不同的。

China a is a large country. So the cities are different.

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但他们也是一个大城市空气污染的很大一部分责任。

But they are also responsible for a good part of air pollution in big cities.

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其中城市污水处理厂的设计水质、水量常与实际差别很大是最主要的一个。

One of them is the wastewater quantity and quality in the design stage.

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当然，在每一个国家，城市居民和住在乡下的人们都会有很大的不同。

And of course, in every country, big city residents are quite different from town dwellers!

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当然，在每一个国家，城市居民和住在乡下的人们都会有很大的不同。

And of course, in every country, big city residents are quite different from town dwellers!

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