LookupPrintServices returns the set of printers that support printing a specific document type (such as GIF) with a specific set of attributes (such as two sided).

lookupPrintServices返回支持打印特定文档类型(比如gif)的打印机集，和一个特定的属性集(比如双面打印)。

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When created with an animation editor, multiple GIF images can be put together like a set of cartoon cels, allowing for simple moving pictures.

利用动画编辑器时，由于会出现简单的移动图像，GIF图片会像一套动画内容一样，产生重叠现象。

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