这也就是applet使多组控件在一个面板内切换显示的方法。

That is how this applet allows several sets of content to alternate in one pane.

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通常，您会提供一个用户界面以允许用户根据需要切换显示模式。

Typically, you provide a UI that enables users to switch among display modes as needed.

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快速切换显示图形的记忆体通常可减少其他情况下可能会产生的重绘。

The relatively quick switch of the displayed graphics memory typically reduces the flicker that can otherwise occur.

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