a chemical element, such as iron or gold, or a mixture of such elements, such as steel, that is generally hard and strong, and through which electricity and heat can travel

Metal, paper, and glass can be recycled. 金属、纸张和玻璃都可被循环利用。

Silver, gold, and platinum are precious metals. 银、金和铂都是贵重金属。

The wooden beam is reinforced with a metal plate. 木梁用金属板加固了。