Pipes may be made of metal, cement, plastic, or bamboo.

水管可以由金属、水泥、塑料或竹子制成。

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The top and bottom ends of the containers may be made of metal or plastic.

在容器的顶部和底部的材质可为金属或塑料制成。

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The reinforcing member may be made of metal or a carbon composite material.

加强件可由金属或碳纤维复合材料材料制成。

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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

It's made of strong metal, it's got very thin slits to be able to see straight ahead, covered up; everything else is covered up, a good one will cover your neck as well.

头盔是坚固的金属制成,正面有一条很细的开口能让士兵看到前方,左右两边都包住,剩下所有地方都包住,好一点的头盔甚至能保护颈部

耶鲁公开课 - 古希腊历史简介课程节选

Metal detectors cannot be used in many cases because landmines can be made of non-metal materials.

VOA: special.2010.05.03

If this can move into mass production, we may start seeing products that were previously made of plastic be made of metal glass instead.

FORBES: Caltech Researchers Develop Cheap Process for Metallic Glass

It seemed to be made of grey metal, shiny but rough, like emery paper.

ECONOMIST: Robert Taylor

All other denominations would be tokens, made of a metal too cheap to be worth melting down, that could be exchanged for higher-denomination ones (or for a set amount of the precious metal) at a rate fixed and guaranteed by the government.

ECONOMIST: The lessons of sound money from 1,000 years' experience