Flowers bloom when they are heavy, and people are not young.

Time flies, the sun and the moon fly like a shuttle.

A time waster is wasting his life for money.

Teenagers don't know how to study early, but they regret studying late.

A lazy youth, a lousy age.

A person's knowledge can be achieved, just like a bone like jade.

There is no doubt that if you change for learning, doubt will enter.

Review the past and learn the new. Studying from time to time is not a pleasure.