He sets low personal standards and then consistently fail to achieve them.

他给自己设定的标准很低，但每次还是达不到。

And to shut down schools that consistently fail to deliver a decent education.

和为了弘扬尽职的教育而关闭总是失败的学校。

You can glean trends during peak traffic periods that result in server overloads , or identify search criteria that consistently fail to deliver anticipated content.

在最高流量的时候，你可以了解一下是什么导致了服务器超载，或者确认哪些搜索标准总是不能达到预期的搜索结果。