Artificial bone and egg shells make good building materials due to their makeup of proteins and minerals.

人造骨和蛋壳是很好的建筑材料，因为它们由蛋白质和矿物质构成。

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Reserves of oil and minerals have grown; their prices have not increased; and demand for materials like copper are not exponential.

石油和矿物的储量增加了，而它们的价格却没有增加；同时，对某些原材料的需求，比如铜，并未呈指数增长。

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That said, the group said Apple has done a better job of avoiding conflict minerals, selling energy-efficient products, and removing hazardous materials from its devices.

从这个数据中可以看出，该组织认为苹果公司在避免冲突矿产、销售节能产品和杜绝采用危险材料方面做的非常出色。

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The system has been developed with the Institute of Materials Minerals and Mining, an organisation that develops materials technologies.

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Other Iranian goods gaining increased market share in Middle Eastern and Asian countries include automobiles, minerals, and construction materials.

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These can made from things like biodegradable vegetable surfactants non-toxic minerals, and other natural materials.

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