Time is money
Someone says, "Time is money." But I think time is more important than money. Why? Because when money is spent, we can make it again. However when time is gone, it'll never return. That is why we mustn't waste time.
It goes without saying that time is limited（有限的）. Even a second is very important. We should make full use of time to do everything useful.
But it is a pity that a lot of people who do not know the importance of time. They spend their limited time smoking, drinking, and playing. They do not know that wasting time means wasting part of their life.
In a word, we should save time. We shouldn't leave today's work tomorrow.
