When you select this option, the CA will be locked and the panel shown in Figure 6 will display.

在选择此选项时，将锁定CA并显示如图6所示的面板。

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Think of the GUI control panel; a high-performance way to program this with Unix is to update the display only when the select() system call detects arriving data.

思考一下前面所说的 GUI 控制面板；在 Unix 中编写这个程序时，一种高性能的做法是只在 select() 系统调用检测到到达的数据时才更新显示。

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Here's the key: When you select the small font or the large font in the display applet of the Control Panel, you are actually selecting an assumed video display resolution in dots per inch.

这里是答案：当你在控制面板的“显示”小程序中选择小字体或大字体时，你实际上是选择一个以每英寸点的视频显示器分辩率。

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