Cereal song earth: Fictitious tellurion software, be together satellitic picture, map, encyclopedia and flight simulator conformity, decorate in an earth on three-dimensional model.

• 谷歌地球：虚拟地球仪软件，把卫星图像、 地图、百科全书和飞行模拟器整合在一起，布置在一个地球三维模型上。