电子垃圾中的材料包括铁、铜、金、银和铝。

The materials from e-waste include iron, copper, gold, silver and aluminum.

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电子垃圾中的材料包括铁、铜、金、银和铝，这些材料可以被重复利用、转售、废物利用或回收。

The materials from e-waste include iron, copper, gold, silver, and aluminum materials that could be reused, resold, salvaged, or recycled.

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筷子所用的材料的种类则各有不同，所选材料有竹子、木材、漆器、玉石、象牙、塑料、铝、银、以及金。

Chopsticks can be made of a variety of materials, including bamboo, wood, lacquer, jade, ivory, plastic, aluminum, silver, and gold.

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