In some cases,instead of a cast, a splint made of plastic or metal will be secured over the area to restrict movement.

VOA: special.2009.02.04

This device held here is really made of mainly plastic and a little bit of metal.

这个装置大部分是用塑料做的,还有一点金属

耶鲁公开课 - 生物医学工程探索课程节选

And the answer, not that there aren't puzzles about it, but the answer is roughly, "It's the very same car if it's the very same hunk of metal and plastic and wires."

而答案，虽然还存在疑问，但答案大致上是，如果是同一堆铁，塑料，电线,就是同一辆车“

耶鲁公开课 - 死亡课程节选

A hoop house is basically a metal frame covered with plastic or other all-weather material.

VOA: special.2009.12.22

A car is just some metal, plastic, rubber.

汽车就是铁，塑胶，还有橡胶组成的。

耶鲁公开课 - 死亡课程节选

And,showerheads made of plastic seemed to have higher bacteria levels than metal ones.

VOA: special.2009.10.13

Throw away damaged metal cans or hard plastic containers.

VOA: special.2010.07.19

These replacement joints can be made of combinations of metal alloys, plastic and ceramic, but new research shows that it might be possible to regenerate damaged joints using a patient's own stem cells.

VOA: standard.2010.08.11