Now, we see this space, this three-dimensional environment, as being a canvas on which all sorts of applications can play out, and map's directions are really just one of them.
现在， 我们看到这个空间，这个三维的环境 作为一块画布 各种各样的应用程序都可以在上面进行发挥 用地图来指引方向只是其中的一个