This allows subclasses to only override methods as needed.
这允许子类根据需要仅覆盖一些方法。
Inside the QuickTemplate subclass, you'll override methods to format and style things like category listings and cross-references the way you want.
在quicktemplate子类的内部,通过覆盖这些方法,可以随心所欲地格式化和样式化类别列表和交叉引用等。
With some implementations of the singleton, you allow writers of subclasses to override methods polymorphically, something not possible with static methods.
最后,在单例模式的一些实现方式中,单例类的子类能够动态地重载方法,这是静态方法所不能办到的。
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