"Delighting in Rain on a Spring Night" Tang Du Fu

Good rain knows the season, when spring comes. Sneak into the night with the wind, moisten things silently.

The wild path is dark, and the river is bright. Look at the red and wet place, the flowers in Jinguancheng are heavy.

Note: Good rain seems to have picked the right time, and it comes in the spring when everything is born. With the breeze, quietly into the night. Fine and dense, nourishing everything on the earth. Thick dark clouds covered the fields and paths; Small lights, flashing fishing boats on the river look at the flowers with dew. Tomorrow morning, Chengdu will be full of flowers.

Second, poems about summer.

"Little Pool" Song Yang Wanli

Spring eyes are silent and pity the trickle, and the shade of trees shines on the water and loves sunny and soft.

The delicate lotus flower bud shows a sharp corner from the water, and a naughty little dragonfly stands on its head.

Note: The silence in spring is due to the reluctance of thin water flow, and the shade reflects the water surface because it likes sunny days and the softness of the wind. The delicate little lotus leaf just emerged from the sharp corner of the water, and a naughty little dragonfly stood on it early.

Three. Autumn Poetry

Autumn night Tang Wangwei

At the beginning of the month, the moon rises, the autumn tea is thin, and the thin silk gown does not change clothes. ?

The long night is full of affectionate silver, guarding the empty room with fear and jealousy, and can't bear to sleep.

Note: at the beginning of the month, the autumn dew is thin, so I wear thin clothes and don't change into other clothes. The long night was full of affection for Yinzheng, and I was afraid of being alone and couldn't bear to go into the house to sleep.

Four. Poetry about winter

"Jiang Xue" Liu Tang Zongyuan

There are no birds flying over those mountains, and there are no traces of people in those paths. ?

A boat on the river, a fisherman wearing his webworm moth; Fishing alone is not afraid of snow and ice.

Note: There is no bird trace in Qianshan Wanling; There are no footprints of pedestrians on thousands of roads. On a lonely boat, a fisherman wearing hemp fiber and hat; Fishing alone in the snow.

Seasonal variation law of extended data

From vernal equinox to summer solstice to autumnal equinox, the northern hemisphere is in summer and the southern hemisphere is in winter. During this period, the northern hemisphere has long days and short nights, while the southern hemisphere has short days and long nights. The north pole is in the extreme day and the south pole is in the extreme night; The height of the sun north of the Tropic of Cancer is always greater than the average, while the height of the sun south of the Tropic of Cancer is less than the average.

North of the Tropic of Cancer, the sun rises on the northeast horizon and sets on the northwest horizon. On the vernal equinox, the sun all over the world rises in the east and sets in the west.

From the autumnal equinox to the winter solstice and then to the vernal equinox, the northern hemisphere is in the winter half year and the southern hemisphere is in the summer half year. During this period, the length of day and night, the extreme value of day and night and the height of the sun in the northern and southern hemispheres are contrary to the above situation. North of the Tropic of Cancer, the sun rises from the horizon in the southeast and sets on the horizon in the southwest.

From summer solstice to winter solstice, from summer to winter in the northern hemisphere and from winter to summer in the southern hemisphere. During this period, the days in the northern hemisphere are getting shorter and shorter, the nights are getting longer and longer, and the extreme day area is getting smaller and smaller. In the southern hemisphere, the days are getting longer and longer, the nights are getting shorter and shorter, and the polar night zone is getting smaller and smaller.

The height of the sun has been declining in the north of the Tropic of Cancer and rising in the south. North of the Tropic of Cancer, the rising direction of the sun changes from northeast to southeast, and the setting direction changes from northwest to southwest. The autumnal equinox rises due east and lands due west.

Baidu Encyclopedia-Four Seasons (Astronomical Phenomenon)