Maintaining an exact duplicate of the production environment.

维护生产环境的一个准确副本。

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Charles scored again, with an exact duplicate of his first goal.

查尔斯再次得分，与第一次破门如出一辙。

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Reproduction cost documents the cost to build an exact duplicate.

复制文件的成本费用，建立一个确切的重复。

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And not only that, to be forced to become the exact duplicate of your clone, to whom you have to spend your whole life with.

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At least seven companies are expected to show 3D printers at CES 2013, demonstrating the potential benefits of the technology for a wide swath of industries and users. 3D printing uses an additive process to create an exact physical duplicate of a product based on a digital model.

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