As long as you append to the front of the list, you won't even have to touch the existing list structure, allowing other threads to iterate through it freely.

当向列表前添加元素时，甚至不必修改现有的列表结构，就可以让其他线程自由地遍历它。

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If you structure a document as an append-only linked list, it allows you to easily revert changes back to previous states.

如果将一个文档作为只能添加（append-only） 的链表来构造，那么这会使您可以很轻松地将修改回复到先前的状态。

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