The first is comprised of the direct costs of purchasing intermediate goods on the market.

一是在市场上购买中间物品的直接费用。

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A common characteristic of the four elements is their close relation to market including factor market, market of final consumption goods and market of intermediate input products.

这四个因素的共同特点是与市场密切相关，既包括要素市场，也包括最终消费品市场，还包括中间投入品市场。

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