当大型电厂、工厂和煤矿提高他们的环保标准，小企业则意味着全部关闭。

As the big power plants, factories and coal mines raise their environmental standards, the small ones are meant to shut down altogether.

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煤矿开采则维持到了1991年。

The coal mines, however, survived until 1991.

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煤矿工人和熔炉工大多数居住在维拉姆煤矿村，煤矿工作则成了这个村庄的核心事务。

These works form the nucleus of the village, which is almost entirely occupied by coal miners and iron-furnace men.

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