早期的殖民者用铜来换玉米。
这根骨头到了国外，被聪明的洋人换作金身铜骨，成了世界人民喜爱的西洋管乐器。
The bone was sent to foreign countries, and was replaced as gold body and copper bone by wise foreigners, which became western orchestral instrument loved by the global people.
分析了铜及合金在火力电厂凝汽器、发电机冷却水系统等换热设备的应用前景。
This article analyzed the application and foreground of copper and its alloys in thermal power plant for condenser and generator cooling water system.
应用推荐