The most obvious example is the automobile. A car contains a wide variety of materials, ranging from glass to steel to rubBer, plus numerous other metals and plastics.

 
  • 最明显的例子便是汽车。生产一辆汽车需用大量不同的材料,包括玻璃、钢材、橡胶,以及许多其他的金属和塑料。
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