As for the materials for packaging, some countries are using polyethylene.

至于包装材料，有些国家使用聚乙烯膜。但许多国家则使用蜡纸或防油纸。

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In earlier times it was necessary to design structural systems suitable for the materials that were available, such as wood, stone, brick.

在早期，有必要设计适合现有的例如木材、石头、砖这样的材料的建筑系统。

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Trading was important, as so many raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.

由于大量原材料，如用于装饰庙宇的半宝石石料、建造屋顶的木材和所有金属都需要进口，贸易变得至关重要。

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He also said that any additional charges, such as for printing in the library or for science materials, must be "banned outright".

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"Together, Alpha and Cleveland-Cliffs will have the size, the management depth and the mining expertise to compete on the global stage as demand for raw materials continues to increase around the world, " Alpha Chairman Michael Quillen said in a statement to the press.

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In his workshop he said he's using nickel silver and ceramics as raw materials for the altar.

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