Are the materials metal, ceramics or plastic?

材料是金属的、陶瓷的还是塑胶的？

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The materials metal and stone are replaced by wood and textile generating a cozy and comforting quality.

木材和纺织品的温暖和舒适的质量取代了金属和石制材料。

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In the present paper, current status of SOFC sealing, including the functions of sealing, sealing strategy, types of sealing, sealing materials metal alloys, braze, mica, glass, glass ceramics, etc.

本文阐述了密封的功能及其对材料的要求，论述了国内外密封材料的研究现状，综述了密封玻璃的研究进展。

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

VOA: special.2010.05.03

The technology could potentially be used in the high-performance composite polymer materials replacing metal in the new generation of superjumbo aircraft.

CNN: The emerging world of self-healing materials

Part of the Dreamliner's appeal to airlines is its increased fuel efficiency due to its construction of lightweight composite materials instead of metal.

CNN: STORY HIGHLIGHTS

More modern versions have been powered by everything from waterwheels to electrical motors, and they work a wide variety of different kinds of materials, including metal and glass.

FORBES: No. 12 The Lathe