工程师们喜欢陶瓷，因为陶瓷在加热时不会熔化，但与金属和塑料不同的是，陶瓷易碎。

Engineers like ceramics because they can be heated without melting, unlike metals and plastics, though, they are brittle.

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降温使得硬盘内部的金属和塑料部件接合的更加紧密。

Lowering the drive's temperature causes its metal and plastic internals to contract ever so slightly.

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能源：回收纸张、玻璃、金属和塑料的想法越来越普遍。

Energy: The idea of recycling paper, glass, metal and plastics has become commonplace.

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Lastly, up here, is a picture of a much smaller device, this is actually an artificial heart valve that is made of plastics and metal and can replace the valve inside your heart.

最后,在上面这里,这张图片是一个相对较小的装置,这实际上是一个人工心脏瓣膜,由塑料和金属制成,可以取代人的心脏瓣膜

耶鲁公开课 - 生物医学工程探索课程节选