I don't understand. It's normal. I don't understand several professional courses at all, and I only got more than 60 in the first exam. But since then, I have been previewing before class, reviewing after class, looking for information on the internet and trying to understand. If it really doesn't work, I'll recite it. Do you believe me? Then I got a first-class scholarship. When I graduated from college, I was fortunate to be an excellent graduate. That's nothing. Most ordinary undergraduate courses are like this, not to mention (I don't look down on junior college, because there are many excellent students in junior college)

You can try to make a change. Either apply for re-reading, as I said, you are now equivalent to previewing. How to adapt?