The feature works similar to backup of a primary server.

这项功能的作用与主要服务器的备份类似。

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Regulators will need to evaluate how well operators would cope if they lost both primary power and backup diesel generators for an extended period.

监管者需评估反应堆在长时间失去主要动力及备用柴油发电机失效的情况下应对的能力。

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A static connector can point to a primary as well as a backup instance.

一个静态的连接器能够指向一个主要实例以及备份实例。

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There are cases in which cloud could function as the primary backup site, with on-premises backup as the failover environment.

FORBES: Why a Hybrid Approach to Cloud Computing Works Best for Now