演示四季形成和昼夜变化，了解其原因。自动模拟地球每年公转；时区环（包
括4 个支持栏和8 个固定螺丝）；地球仪底座，地球仪分为两个部分：连
锁的北半球和南半球，带动地球仪转动的齿轮；遮光效果演示（配灯泡),AC
电源适配器。
To demonstrate the formation of the four seasons and changes in day and night to understand the reasons. Automatically simulate the Earth's annual revolution; time zone ring (including 4 support bars and 8 fixed screws); globe base, the globe is divided into two parts: the chain of the northern and southern hemispheres, driving the rotation of the globe gear; shading effect demonstration (with light bulbs) , AC power adapter.
