International commerce was therefore dominated by raw materials, such as wheat, wood and iron ore, or processed commodities, such as meat and steel.

因此，国际贸易以原材料（如小麦、木材和铁矿石）和加工商品（如肉类和钢铁）为主。

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In theory, the Army could use such a system to approach targets covertly and drill through concrete, steel, wood, or other materials from a stand-off distance equal to the length of a football field.

理论上，美国陆军将利用该系统实现某些目标，既通过远距离(超过一个足球场的距离)的设备对混凝土、钢铁、木头以及其他材料进行隐蔽的击穿作业。

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Caro often works in steel, but also in a diverse range of other materials, including bronze, silver, lead, stoneware, wood, and paper.

卡罗经常使用钢做作品，但也采用多样化的其它材料，比如青铜、银、铅、石制品、木头和纸。

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And while the company says it is able to be drilled, tapped or screwed, its material properties are unknown compared to traditional materials like real wood or steel.

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Modern architecture is notable above all for the use of steel and concrete, and to a lesser extent wood, as building materials.

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Construction materials for housing typically include lumber, wood, gravel, metal, iron, and steel.

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