Running a live pair of repositories in production and another live pair in disaster recovery solves the problem of currency, but it brings us back to the replication problem.

在生产环境中运行一对活动储存库并在灾难恢复中运行另一对活动储存库能够解决并发性问题，但是它将把我们带回到复制问题。

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These are defined between the first pair of braces in the production, as shown in Listing 16.

如清单 16 中所示，这些变量是在产生式中第一对花括号之间定义的。

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The pair considered three aspects of global livestock production: greenhouse gas emissions, biomass consumption and nitrogen emissions.

两位研究人员考虑了全球畜牧业生产的三个方面：温室气体排放，生物质消耗和氮排放。

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For the good of the production, industry insiders speculate the pair may have put their differences aside and sat down for a bit of political strategizing in their mutual best interest.

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During the production of eggs and sperm, chromosomes pair up, cross over and swap segments of DNA, mixing the genes you inherited from your mother and father (see diagram).

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Often toting nothing more than a USB stick and a pair of Pioneer CDJs, their production costs are often negligible, unlike rockers and pop stars who typically take home just one-third of gross ticket sales.

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