地处德国西部的鲁尔工业区横跨10多个城市，原以煤炭开采和钢铁生产为主要产业。
The Ruhr industrial area located in the west of Germany crosses more than 10 cities and originally relied on coal mining and steel production as the major industries.
这个杂志报告是基于一个持续的研究数据，这个研究是在德国鲁尔工业区的三个城市进行的。
The journal report is based on data from a continuing study done in three cities in the industrialized Ruhr area of Germany.
鲁尔区是欧洲最大最老的工业区之一，也是德国人口最稠密的地区之一。
Ruhr is one of the biggest and oldest industry areas in Europe, and is also one of the densest areas in Germany.
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