If Deep traversing is enabled, functions are evaluated considering all lower levels of hierarchy. This would be used for instance for line numbering. If Deep traversing is not enabled, only the first level of hierarchy is evaluated.
如果启用“深度遍历”，计算函数时将考虑到所有更低层次的层次结构。这将用作行编号的实例。如果没有启用“深度遍历”，只能计算首层的层次结构。