To better understand the concept of ownership, look at the stack of stacks data structure together with objects owned by each element.

为了更好地理解所有权关系的概念，可以将栈中栈数据结构与每个元素所拥有的对象结合起来。

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This simple design, possible because the data obeys strict LIFO order, means that no complex data structure is needed to track stack contents - a simple pointer to the top of the stack will do.

这种简单的设计，很有可能是考虑到数据操作都符合后进先出（LIFO ）规则，这意味着访问栈的内容并不需要复杂的数据结构，一个简单的栈顶指针就能搞定一切。

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If you want to keep track of the relative nesting and context in which a tag occurs, you need to maintain your own stack, or other data structure.

如果要跟踪标签出现的相关嵌套和上下文，您必须维护自己的栈或者其他数据结构。

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