1. A person with black hair does not know how to study early, but a person with white hair regrets studying late.

2. It is easy for a young man to learn but hard for him to grow old. No inch of time should be taken lightly

3. An inch of time Time is precious, but time is hard to buy.

4. If a young man does not work hard, the old man will be sad. 5. Don’t wait for a long time. The young man’s head will turn gray, and he will be sad in vain! 6. If you are full, you will suffer losses, but if you are modest, you will benefit. 7. Smart and eager to learn, and not ashamed to ask questions. 8. When the book is used, you will regret it less. You will not know the difficulties until you have experienced them. 9. If you learn without thinking, you will be in vain; if you think without learning, you will be in danger.

10. Be tireless in learning and teaching.

11. Learn and then don’t know enough.

13. There is no end to learning. 14. Saving time and studying hard is a good way to learn. 15. Wealth must come from hard work, and a man must read five cars of books.