一个很好的例子为中世纪并在其后的是银，铅，铜采区的哈尔茨山脉东北德国。
A good example for the Middle Ages and thereafter was the silver, lead, and copper mining district of the Harz Mountains in northeastern Germany.
一个很好的例子为中世纪并在其后的是银，铅，铜采区的哈尔茨山脉东北德国。
A good example for the Middle Ages and thereafter was the silver, lead, and copper mining district of the Harz Mountains in northeastern Germany.
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