At the same time, forests provide raw materials for human activities through their constantly renewed production of wood.

同时，森林通过不断更新木材数量为人类活动提供天然原料。

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At the same time, attention must also be paid to product design, to ensure that valuable raw materials are easier to recover in the recycling phase.

与此同时，为了确保有价值的原材料更容易在再循环阶段被回收，就必须更加注意产品设计。

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At the same time can import all kinds of chemical raw materials and machinery parts.

同时可以进口各种化学原料和机械配件。

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They will have the same risk profile as the raw materials but this time the rewards from being engaged with commodity based stocks will be far closer to the returns delivered by the commodities themselves.

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At the same time, many companies in Asia source a sizable percentage of raw materials from their own country, so they are paying relatively less for inputs -- yet they sell in U.S. dollars.

CNN: Money & Investing

At some point in the future a situation exists where those world-wide supplies of raw materials start to dwindle and developed countries watch prices go up as they all compete for the same things.

CNN: Just Imagine - Living Space: Your views