copper metallurgy

基本解釋

Because of economic system and market demand changing, lots of problems have appeared in the developing process of copper metallurgy city.
但是由于市場需求、經濟體制的變化和資源枯竭的原因，銅冶金城市在發(fā)展過程中出現(xiàn)了很多問題。
Yan-culture is centered around Beijing region, where every stage of the evolution of copper metallurgy was probably undertaken during 2000 years history.
以北京地區(qū)為核心的燕文化近兩千年的發(fā)展歷程可能經歷了冶銅技術演化的各個階段。
Copper metallurgy city is one kind of a large number of resource-based cities that China owns. They have played an important role in economic development of our country.
我國擁有數(shù)量眾多的資源型城市，銅冶金城市是其中的一種，對我國經濟的發(fā)展起著舉足輕重的作用。