session failed meaning in Chinese

操作时限已过

The database mirroring session fails over to the mirror server on the other cluster or unclustered computer , and the former mirror server becomes the principal server
数据库镜像会话故障转移到其他群集或非群集计算机中的镜像服务器，并且先前的镜像服务器变为主体服务器。
This approach is straightforward enough , and has the advantage that not only can the session fail over to any other host , but the session data can survive the failure of the entire cluster
这种方法相当直观，其优点是不仅会话可以故障转移到其他主机，而且即使整个群集失效，会话数据也可以保存下来。