1、The temperature drops, the fruits are harvested, the plants are withered, the difference between day and night is smaller, the climate is dry.
温度渐降、硕果丰收、植物枯萎、昼夜长短差距变小、气候干燥。
2、In autumn, the point of direct sunlight gradually moves southward from the northern hemisphere, crossing the equator after the autumnal equinox and reaching directly into the southern hemisphere.
From the northern hemisphere, the Angle of the sun gradually decreases, narrowing the gap between day and night.
秋天太阳直射点从北半球逐渐南移，秋分之后越过赤道，太阳直射南半球。从北半球看来，太阳的角度渐渐变低，昼夜长短差距变小。
3、Day and night are equal in length at the autumnal equinox. In autumn, the distance between the earth and the sun gradually decreases.
秋分时昼夜等长。在秋季，地球与太阳的距离由远渐近。
4、From the ecliptic plane, the sun is in the background of Leo, Virgo, and Libra.
5、The most obvious change in autumn is in the trees. Cities begin to sweep away leaves and the mountains are flooded with tourists to see the maple.
秋季最明显的变化在树木，城市开始清扫大量落叶，山区则涌进不少观赏枫红的游客。