A punctual person is in the habit of doing a thing at the proper time and is never late in keeping an appointment. The unpunctual man，on one hand，never does what he has to do at the proper time. He is always ina hurry and in the end loses both time and his good name. There is a proverb that says, "Time flies never to be recalled". This is very true. A lost thing may be found again，but lost time can never be regained. Time is more valuable than material things.