(铜不再是一种“自我推销”的材料,在我们未来的世界中,工业如何与材料的各种要求相适应呢?) 从1870～1970年,世界钢的年产量从1000吨增加到6亿吨(图1)。从1870～1940年,钢产量的增长是少而稳定(由年产1000万吨增至1.5亿吨),而从二十世纪四十年代后期起,钢有了急剧的上升趋势。根据目前的预计,世界钢的年产量在1985年将增加到约11.5亿吨, (Copper is no longer a “self-marketed” material, how can industry fit into the material requirements in our future world?) From 1870 to 1970, world steel production increased from 1,000 tons 600 million tons (Figure 1). From 1870 to 1940, steel production growth was small and steady (from 10 million tons to 150 million tons per year), but steel has risen sharply since the late 1940s. According to current estimates, the world steel production will increase to about 1.15 billion tons in 1985,