Time waits for no one. If it flows away, it will never come to us again. We can't take charge of our time but we should know the importance of time and cherish time.
时间不等人。如果它流逝了，它就永远不会再回来。我们不能控制时间，但我们应该知道时间的重要性并珍惜时间。
Yesterday has become the history. Nothing we can do to save it. Tomorrow is not within our reach. We don”t know what will happen tomorrow. So the only th
