If you want to know the value of a year, ask a person who has just failed the university entrance exam.
If you want to know the value of a month, ask a mother who has just borne a lack-month child.
If you want to know the value of a week, ask a person who has had cancer at the last period.
If you want to know the value of a day, ask an editor of a daily newspaper.
If you want to know thr value of an hour, ask a person who has just been stuck in an elevator.
If you want to know the value of a minute, ask a person who has just missed a bus.
If you want to know the value of a second, ask a person who has a relative that has just died in a traffic accident.
If you want to know the value of a tenth of a second,ask a person who has just won the second prize.
Time is invaluable.When it passed, it would never return.So,
"Don't live as if you had a thousand to live,live as if tomorrow was a day at the end of world".
Translated by "Blue Kite"