XSLT can add or remove elements or attributes to or from the output file.
XSLT可以向输出文件中添加或者从其中删除元素或属性。
You can access elements using this key later and can even remove elements.
可以在以后利用这个键来访问元素，甚至可以删除元素。
Not only do you add and remove elements, you can also look at the queue to see what is there. Listing 5 shows the five methods of the queue interface.
不仅能添加和删除元素，还能查看队列中有哪些元素。
Not only do you add and remove elements, you can also look at the queue to see what is there. Listing 5 shows the five methods of the queue interface.
不仅能添加和删除元素，还能查看队列中有哪些元素。
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