图像文件代表在下拉列表中选择的某一个国家的国旗。
The image file represents the flag of a particular country selected in the drop-down list.
只需要向convert传递图像文件的一个列表，并确保最后一个文件名是您要将它们放入的PD f文档的名字。
Just pass a list of image files to convert, and make sure that the last filename in the list is the name of the PDF document to put them all into.
这是您要放映的图像文件的列表。
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