The days of youth are easy to pass away, and learning is difficult to succeed, so cherish every inch of time and don't let it go easily. Before the sweet spring grass grows in the pond, the plane leaves in front of the steps have rustled in the autumn wind. Seriously and vividly tell the world that time flies, you may be lying on the grass by the pond dreaming a beautiful dream, the steps are covered with golden phoenix leaves, and autumn has come; People get old easily, but knowledge is very successful, so don't waste time.