正规体育场都是南北朝向,这是为什么呢?地球自转和公转是国际体育组织要求运动场地方向的主要依据。以北半球为例,中午12时以前,太阳光从体育场的东面向西面照射;中午12点以后,太阳光从运动场的西面向东面照射。这对于自北向南或自南向北跑动的运动员来说都是“侧光”,从而避免了阳光直射人眼。如果运动场是东西走向,那么,在上午,太阳光就会直接照射面向东的运动员的眼睛,不但 Formal stadiums are North and South, why? Earth rotation and revolution is the main basis for the international sports organizations require sports grounds. In the northern hemisphere, for example, before 12 noon, the sun shines from the east to the west of the stadium. After noon, the sunlight shines from the west to the east of the stadium. This is “sidelight” for athletes running north-south or north-south, thus avoiding direct sunlight. If the playground is something, then in the morning, the sun shines directly on the east-facing athlete’s eyes, not only