3私建乱建的混乱空间关系，模糊不清的肌理，消失殆尽的街巷亲和气息。
3 build private mess of chaos space relation, fuzzy texture, vanish the lanes of the affinity.
所有数据引用都显式表明每个节点上的名称空间，避免在允许默认名称空间(其中不使用前缀)时可能产生的混乱。
All references to data explicitly state the namespace at each node, avoiding confusion that can arise when allowing the default namespace, where no prefix is used.
可以看到，在同一个文档中混合使用不同形式的名称空间声明很容易产生混乱。
As you can see, it's easy to create confusion by mixing and matching various forms of namespace declarations within a single document.
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