1. All of these are transparent to you, as you still end up with a node that has the name you want. 所有这些对于您来说都是透明的，最终得到的是一个具有您所希望的名称的节点。
2. One of its purposes is to register for all notifications which occur on that cell, node, or server. 其目的之一就是注册该单元、节点或服务器上发生的所有通知。
3. Because node structures go in only one direction, they know nothing about the sequence of nodes that precede them. 由于节点结构只指向一个方向，所以它们完全不了解它们之前的节点的顺序。
4. This method tells you all information you need to know: whether one node is descendant of an ancestor of the other, whether it is before or after, and so on. 这个方法告诉您所有想知道的信息：一个节点是否是另一个节点的祖先的后代，它是在前面还是后面呢，等等。
5. We know that the zero does not count as a node, if per se I actually had managed to hit zero in drawing that, the correct answer would be the bottom one there. 我们知道0不能算作一个节点，如果我确实把零点画成了0，那正确的答案应该是下面的那个。
