本文在这里并不讨论关于AST的任何细节，除非当扩展需要向生成的代码添加新元素时，才会涉及到一些。通过访问AST的方法来做到这一点。
This article will not discuss the AST in any detail here, except to say that when the extension needs to add new elements to the generated source it does so by calling methods on the AST objects.
这是另一种内容升级方法；这会简洁地扩展和更新玩家可以访问的内容。
This is a content upgrade of a different kind; it gives you a nice, neat way to expand and refresh the content available to the gamer.
此访问方法进一步扩展为了xml路径语言(XML path Language,Xpath)的一个子集。
This method of access extends further to a subset of XML Path Language (XPath).
在与Nautilus相同的流程中执行的扩展，能够访问对象、方法、和属性。
Extensions execute in the same process as Nautilus and, therefore, have access to objects, methods, and attributes.
它以一种面向对象的方式提供访问资产清单的对象和方法，并提供对资产已扩展元数据的完全控制。
It provides objects and methods for accessing the asset manifest in an object-oriented style and offers full control on the extended metadata of the assets.
你可以通过使用一个扩展方法来扩展一个类的功能，但只能使用你有权访问的类成员。
You can extend the functionality of a class by using an extension method, but using only the class members that you had access to anyway.
仅在子类型扩展的类有一个可访问的无参数构造方法来初始化该类的状态时，才可以假定子类型有此职责。
The subtype may assume this responsibility only if the class it extends has an accessible no-arg constructor to initialize the class's state.
信任管理是一种具有动态可扩展性的新型访问控制方法。
Trust management is a new kind of access control method which is dynamic and scalable.
信任管理是一种具有动态可扩展性的新型访问控制方法。
Trust management is a new kind of access control method which is dynamic and scalable.
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