The primary purpose of the RS secondary server is to provide a disaster recovery solution.
RS备用服务器的主要作用是提供灾难修复解决方案。
Yesterday afternoon, we had a "Primary School Student's Disaster Drill".
昨天下午，我们举行了“小学生防灾演练”。
Yesterday afternoon, we had a "Primary School Student's Disaster Drill".
昨天下午，我们举行了“小学生防灾演练”。
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