回複：如何將多個PDF合成一個文件？

If you have linux or unix or just cygwin etc, you can use pdftk to merge
several files into one. for example, if you want file1.pdf file2.pdf file3.pdf or more into new.pdf, you can use command "pdftk file*.pdf cat output new.pdf" or "pdftk file1.pdf file2.pdf file3.pdf cat output new.pdf". Put the input files in the order you want.