We only live once in the world, so we should cherish our time. We must live a real life and a valuable life. -Pavlov

3, the night light is five more chickens, it is the time when men are determined to win. Teenagers only know how to play, but don't know how to study hard. When they are old, they regret why they didn't know how to study hard when they were young. -Yan Zhenqing

4. If young people don't work hard, old people will be sad. -Han Yuefu

5, advise you not to cherish golden clothes, advise you to cherish youth. When the flowers should be folded, we should fold them quickly, and don't wait for the flowers to wither before folding one.

6. Don't always lament the past, it will never come back; Improve the present wisely. We must devote ourselves to the confusing future with a firm will that is not worried or afraid. -Longfellow

7. Don't sigh for the lost years, but face up to the time that has slipped away in a hurry. Brecht