The solution consists of two components. First, we must provide a head vector in parallel to the world vector, and second, we must provide a path by which a user can learn the head vector corresponding to each world vector.

• 解决方法由两部分组成，首先，我们必须让头脑途径与世界途径并存；其次，我们必须为用户提供让用户学会对应于每个世界途径的头脑途径的路径。