Some pdf files are not fully displayed, especially on the left and right sides

[Russell]

Hello,

Please, do not duplicate the question in different topics.

一些pdf文件，内容展示不全，尤其是左右两侧有内容隐藏 Some pdf files are not fully displayed, especially on the left and right sides

我发发现一些pdf文件，内容展示不全，尤其是左右两侧有内容隐藏，下图为现象