当 VBAT 超出其工作范围时，将监视电池输入并激活故障信号。
Battery input is monitored and a fault signal becomes active when VBAT is out of its operative range.
如果出现站点范围内的故障，则存活的站点总是有一个可镜像的、准确的数据库映像。
If a site-wide failure occurs, the surviving site always has a mirrored, accurate image of the database.
如果还失败，你可能需要联系您的系统管理员去排除故障，这超出了本文所讲的范围。
If that fails, you may need to have a long chat with your machine's system administrator to figure out what's causing the failure, which, unfortunately, is beyond the scope of this article.
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