What is a long song line? Morning dew, flowers and plants wither, and all rivers return to the sea. What does it mean and what does it advise?

Long Songs is a five-character classical poem in Yuefu Poem compiled by Guo Maoqian (104 1- 1099), a scholar in the Northern Song Dynasty, and it is a famous article that exhorts the world to cherish time and forge ahead. This poem conveys feelings with scenery, and makes the philosophy of life "Young people don't work hard, but old people are sad" with vivid and vivid methods, such as morning dew is easy to dry, Qiu Lai leaves fall to the roots, and all rivers flow to the east, which makes the philosophy expressed thought-provoking and easy to understand. Worried about the arrival of autumn, because in autumn, flowers and plants wither and everything loses its vitality; Yellow, flowers wither, and everything loses its vitality; All rivers flow into the sea in winter, and all rivers flow into the sea in winter. When can they return? Teenagers don't study hard, can they flow back? It's no use crying and regretting when you are old if you don't study hard in your teens. It's no use crying and regretting when you are old. I realized that the author lamented that time was short, fleeting and gone forever. It's fleeting and gone forever. I hope everyone will cherish the time and work hard as soon as possible. We cherish time, work hard as soon as possible, and don't wait until we are old to regret and sigh. I regret sighing when I am old.