2. Boys will be boys.

　　3. Business is business.

　　4. Diamond cuts diamond.

　　5. Do as the Romans do.

　　6. Eat to live, but not live to eat.

　　7. Experience without learning is better than learning without experience.

　　8. Fools learn nothing from wise men, but wise men learn much from fools.

　　9. Time is money, but money is not time.