Don't copy it, because you don't understand it. What's the point of plagiarism? You can't do it if you can't. You can ask the teacher if you don't understand. Don't be afraid. Teachers like to ask students who don't understand. Copy it and do it yourself. If you copy, you will encounter this kind of problem next time. You still won't. Isn't this self-deception? So I advise you not to copy, after all, it is also the result of other people's labor.