故障转移是主系统在计划内或计划外的关闭，并包括完成将备用节点置于在线以接管处理负载的任务。

Failover is the planned or unplanned shutdown of the primary system and includes the accompanying task of bringing a standby node online to take over the processing load.

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停机时间包括计划内和计划外停机时间。

Downtime includes both planned and unplanned downtime.

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计划外招生： 具有高中或同等学历即可报名入学，包括历届生、在职人员以及高考落榜生等。

PES (Private Education System) 2-year Program: Applicable to Senior high school students or equivalents, including former senior-high graduates, and professionals.

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