However, this definition does not create a new named object in the program and topic namespaces.

然而，这个定义不会在程序和主题名称空间里创建新的命名的对象。

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This object is the key to creating and executing new XQuery expressions; you haven't done that yet, but now your program is ready to take in a query string, and execute it.

该对象对于建立和执行新的 XQuery 表达式非常重要，虽然现在还不能执行这些功能，但是可以接受查询字符串并执行了。

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The object oriented programming is a new technology, which derives abstract classes from real objects and builds the program structure by means of heritage.

面向对象编程是一种新的编程手段，它通过从真实对象中派生出抽象的类，并通过继承的方法来构造程序结构。

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