His family operates factories and mines.

他的家族经营厂矿。

youdao

Screw conveyor is a transportation machinery widely used in factories and mines.

螺旋输送机是工厂和矿山广泛使用的物料输送装置。

youdao

These dangerous materials may affect the water of thereservoir once the factories and mines are submerged.

这些工厂和矿井一旦沉入水底，散发出的有毒物质就会影响水库的水质。

youdao

By then, more than five million persons were working in factories and mines.

VOA: special.2010.05.13

The great wealth taken from the gold and silver mines was usually invested in other businesses: shipping,railroads,factories, stores,land companies.

VOA: special.2010.03.18

And they came by the hundreds of thousands to take jobs in steel factories in Pennsylvania and the coal mines of West Virginia.

VOA: special.2010.05.20

But how can this goal be accomplished when coal factories and mines are owned by government and organized labor?

FORBES: Doha Climate Talks: Why Agreements Cannot Be Fulfilled

Factories and mines clamored for workers as an underpopulated continent beckoned settlers.

CNN: What's the value of immigration?

He described a region that contains much of Germany's heavy industry yet the rivers along which factories and mines are sited remained relatively unpolluted.

ECONOMIST: Allen Kneese