问题
In How to transfer OCR text from one PDF to another PDF one answerer says that copy text from one PDF to another is not a trivial undertaking, though possible. If so, then what steps does it need to do so? For the sake of the guide, let's assume that the source file and the target file have identical metadata.
来源：https://stackoverflow.com/questions/61066590/what-steps-to-copy-text-from-one-pdf-to-another-pdf