it depends...

来源: 于 2007-02-28 22:20:00 [旧帖] [给我悄悄话] 本文已被阅读：次

if the PDF is made from images, you can't use any software you mentioned above. to get what you want, try some OCR(optical character recognition )softwares.
other than that, Acrobat Professional should work.