google 地球，此产品是google和美国太空总署的合作结晶，没有任何一家以盈利为目的地公司会做这样的傻事。目前广泛被使用，各家媒体公司都在采用其思想。-google earth google, and this product is a collaboration between NASA, there is no a for-profit Destination company will do so foolishly. Widely used, various Media companies are using its ideas.