在谷歌Chrome浏览器中打开PDF文件。 点击“打印”按钮。 点击打印机下方的.更改... 按钮。 在“本地目标”部分里选择“另存为PDF”。 输入页面范围，创建为新文档。 点击“保存”按钮并为文件命名。 重复操作，创建另一个文档。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The easiest way to do this is to drag the PDF file into an open Chrome window.  You can also right-click on the PDF file, select "Open With", and then select Google Chrome from the list of available programs. If the PDF won't open in Chrome, type chrome://plugins/ into the Chrome address bar and then click the "Enable" link under "Chrome PDF Viewer". You can find this in the row of buttons that appears when you move your mouse to the lower-right corner of the Chrome window. Change... button unde