✔ 最佳答案
When four seasons origin earth rotation, because the earth axis and the revolution track plane forms the angle which inclines, therefore various areas the sunlight perpendicular incidence or the oblique incidence degree, can change along with Earth's on revolution track position, each place gas marquis thus appears the change, has the four seasons. For example the vertical incident solar rays Northern Hemisphere partial local zone times, can simultaneously the oblique incidence southern hemisphere partial areas. Because the Northern Hemisphere partial zone times, can simultaneously the oblique incidence southern hemisphere partial areas. Because the Northern Hemisphere partial areas accept sunlight more centralized, the temperature can be higher, therefore is the summer. On the contrary, the southern hemisphere partial areas are the winters. As for in receives between the sunlight perpendicular incidence and the oblique incidence area, the temperature neither cold nor hot, is the spring or the autumn.