If you have problems with your basic vocabulary, for example, your basic vocabulary of CET-4 and CET-6 has not been broken. Then you'd better find a book with root affixes to review it.

If you are unfamiliar with professional vocabulary, you can only read more to promote vocabulary growth.

Before watching the advanced interpretation class, I went through the vocabulary of CET-4 and CET-6 and postgraduate English. There are many familiar words. Even using root affixes is easy to remember. There are very few new words really encountered in interpretation class. Professional vocabulary, mostly phrases and collocations. I didn't encounter the problem you mentioned.