1. Take the initiative to ask questions: In class, you can bravely raise your hand to ask the teacher questions if you don't understand them. This can not only solve their own doubts, but also benefit other students.

2. Ask after class: If you are embarrassed to ask questions in class, you can ask the teacher after class. This will not only avoid disturbing other students, but also allow the teacher to answer your questions in more detail.

3. Discuss with your classmates: After class, you can discuss with your classmates what you don't understand, help each other and make progress together. Through discussion, new ideas and methods may be found.

4. Access to information: You can use your spare time to access textbooks, reference books and online resources to find clues to solve problems. This can not only improve their self-study ability, but also broaden their knowledge.

5. Participate in remedial classes or training courses: If you feel that your foundation is weak, you can choose to participate in some remedial classes or training courses to systematically learn relevant knowledge.

6. Adjust your learning methods: If you find that you often encounter problems that you don't understand, it may be that there is something wrong with your learning methods. You can try to adjust your learning methods, such as previewing, reviewing, taking notes, etc., to improve the learning effect.

7. Keep a positive attitude: It's normal to encounter problems you don't understand. Don't be discouraged. Keep a positive attitude and believe that you can overcome difficulties and constantly improve yourself.

In short, college students should face up to the problems they don't understand and actively seek solutions. Through continuous efforts, I believe I can master professional knowledge and lay a solid foundation for my future study and work.