What is the purpose of seeing the first and last paragraphs of the weather from the clouds?

The structure of the first paragraph is the total score, which always says that clouds are a sign of weather.

The structure of the tail section is a summary, and it is written that the role of the cloud is limited.

The first paragraph: The clouds in the sky are really ever-changing. Some are like feathers, floating gently in the air; Some are like fish scales, neatly arranged one by one; Some come and go like sheep; Some are like a big quilt, covering the sky tightly; Others are like mountains, rivers, lions and galloping horses ... sometimes they decorate the sky beautifully, and sometimes they cast a shadow over it. Just now, it was white clouds and sunny. In a blink of an eye, it was cloudy and it rained cats and dogs. Clouds are like a sign of the weather: what kind of clouds hang in the sky will lead to what kind of weather.

Tail: Clouds can help us identify sunny and rainy days and predict weather changes, which is of great significance to industrial and agricultural production. If you want to learn to know the weather by observing the clouds, you must learn from experienced people with an open mind, pay attention to the changes of clouds, and grasp the law through repeated observation. However, the weather changes are extremely complicated, and there are certain limitations in understanding the weather by looking at the clouds. To accurately grasp the weather changes, we must rely on the weather forecast.