The value of the raw material for extraction can be lost after six to twelve months’ storage.

在储藏6至12个月之后，可能失去原材料提取的价值。

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This is the (key, value) extraction stage and it happens in each spawned process.

这是(key, value)提取阶段，这在生成的每个进程中执行。

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Classical feature extraction methods include: Principle Component Analysis, Singular Value Decomposition, Projection Pursuit, Self-Organizing Map, and so on.

传统的特征提取方法主要有：主分量分析、奇异值分解、投影追踪、自组织映射等。

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Their businesses are not dependent on entrenched profit models that center on value extraction from existing technology.

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One would expect that in purchasing or leasing land for resource extraction estimating the value of that land would introduce some risk.

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The cost of extraction would be higher than the value of the copper to us.

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