Divide four seasons according to climate and average temperature. The index is that the average temperature is below 10℃ in winter, above 22℃ in summer, and 10~22℃ in spring and autumn respectively.
In autumn, the direct point of the sun gradually moves south from the northern hemisphere, passes through the equator after the autumnal equinox, and the sun shines directly into the southern hemisphere. Seen from the northern hemisphere, the angle of the sun gradually becomes lower, and the gap between day and night becomes smaller. At the autumnal equinox, the length of day and night is equal. In autumn, the distance between the earth and the sun is from far to near. Seen from the ecliptic plane, the sun is on the background of Leo, Virgo and Libra.
Beautiful sentences in autumn:
1. Autumn comes with the sound of fallen leaves, and the morning is fresh as dew. The sky exudes soft light, clear and ethereal, which makes people want to listen to the soaring songs of larks, just like looking at the blue sea and thinking of seeing a white sail.
2. In the autumn morning, the sun just smiled and reflected on the golden wheat, which made people dizzy. Birds sing, dewdrops are crystal clear, and the morning sun brings joy to the day.
3. Why is autumn sad? Because the tree hurts the leaves of the tree. Otherwise, I won't be sad in autumn, because falling leaves is to show the sadness of trees. My heart is also the heart of leaves. I have been very sad this autumn, but I will become strong because I am eager for happiness. ...
Aunt Qiu walked into the field and painted the endless Tanobe golden yellow. The rice has grown tall, the seedlings are mature, the wheat is laughing, the corn is bent with laughter, and the sorghum is red. The farmer's uncle is happy to see it!
From summer to autumn, everything begins to wither, the breeze stirs the dew on the petals, the leaves of plane trees fall one after another, the golden ears of rice sway in the autumn wind, and the crimson fruits are noisy in the branches. The seemingly cold autumn brings people joy.