此程序创建一个包含几个节点的链表，填充数据，输出它们，最后删除所有节点。

This program creates a linked list of few nodes, fills in the data, prints them, and finally deletes all the nodes.

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所以它将会创建一个链表。

So it, too, is going to create a list.

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Buffer 包含关于已创建的抽象缓冲区的信息，它还管理内存块的一个链表

The Buffer holds the information about a created abstract buffer, and it manages a linked list of memory blocks

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