可以在衍生类别中覆写这个方法。
这是在衍生类别中处理事件的惯用技术。
This is the preferred technique for handling the event in a derived class.
衍生类别的存取范围不可大于其基底型别的存取范围。
Derived classes cannot have greater accessibility than their base types.
当在衍生类别中覆写时，判断指定纪元中的指定日期是否为闰日。
When overridden in a derived class, determines whether the specified date in the specified era is a leap day.
在衍生类别中覆写时，将指定字串中的所有字元编码成位元组序列。
When overridden in a derived class, encodes all the characters in the specified string into a sequence of bytes.
因此，衍生类别必须提供自己的实作。
Therefore derived classes must provide their own implementation.
您可以选择性地在衍生类别中覆写这个方法，来提供自订初始化常式。
You can optionally override this method in the derived class to provide a custom initialization routine.
在衍生类别中覆写时，会针对提供的设定档清单，删除这些设定档的属性和资讯。
When overridden in a derived class, deletes profile properties and information for the supplied list of profiles.
在以下范例中，资料型别从衍生类别转换为其基底类别，但转换后两变数所指向的物件并未变更。
In the following example, the data type is converted from the derived class to its base class, but the object that both variables now point to is unchanged.
衍生类别中的函式试图覆写基底类别中的虚拟函式，但衍生类别函式没有与基底类别函式相同的传回型别。
A function in a derived class attempted to override a virtual function in a base class, but the derived class function did not have the same return type as the base class function.
使用这个方法覆写特定衍生类别的中继资料后，若再尝试覆写此相同衍生类别的中继资料，将会引发例外状况。
After metadata for a particular derived class override is established with this method, subsequent attempts to override metadata on this same derived class will raise an exception.
以非同步方式传回衍生自此类别之所有类别的集合。
Returns the collection of all classes derived from this class, asynchronously.
大多数KDE应用程序会衍生此类别，因为它提供了一个简单的方法，透过XML档案定义选单和工具列的排版(这种技术称为XMLGUI)。
Most KDE applications will derive from this class as it provides an easy way to define menu and toolbar layouts through XML files (this technology is called XMLGUI).
由抽象类别衍生出来的类别必须实作纯虚拟成员函式，否则它们也是抽象类别。
Classes derived from the abstract class must implement the pure virtual member function or they, too, are abstract classes.
在交易所交易的衍生品应该被登记成一种类别。
Derivatives traded on exchanges should be registered as a class.
金融机构在开办衍生产品交易业务时应明确其所属的机构类别。
A financial institution should specify which category it belongs to when launching derivatives business.
监管机构希望更多的衍生产品交易在交易所内进行，这样可以更容易发现可疑的涉及资产类别的交易。
Regulators hope that as more derivatives trade on exchanges, it will be easier to spot suspicious trading patterns across asset classes.
监管机构希望更多的衍生产品交易在交易所内进行，这样可以更容易发现可疑的涉及资产类别的交易。
Regulators hope that as more derivatives trade on exchanges, it will be easier to spot suspicious trading patterns across asset classes.
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