在罗马帝国的全盛时期，意大利庞贝古城是一个拥有约两万定居者的繁荣城市。

In the heyday of the Roman Empire, Pompeii in Italy was a thriving city of about 20,000inhabitants.

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中心商务区在繁荣城市经济的同时，其高密度特征也给城市健康带来了一定影响。

While CBD is boosting the city economy, these features also make a bad influence on the city health.

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首先应归于远离故土、常常远离家人到中国沿海繁荣城市的工厂里找工作的数千万工人。

Above all, the tens of millions of workers who have left their homes, and often their families, to find work in the factories of China's booming coastal cities. '.

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