A description of the different server environments display at the bottom of the panel when you highlight that server environment.
当您突出显示不同的服务器环境时，该服务器环境的描述显示在面板底部。
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Computer experts at the University of California in San Diego set out to show how easily keys could be copied from a digital image to highlight the potential security risk of leaving keys on display.
The lesson is this: if you're not sure what data a specific counter collects, highlight the counter and select EXPLAIN to display a description (Figure 6).