通常，通过复制现有的DTD并且添加或者除去主题或域，实现起来最方便。
Often, it is easiest to work by copying an existing DTD and adding or removing topics or domains.
通过复制现有的样式文件来定义您的定制样式表。
Define your custom stylesheet by copying an existing style folder.
第二个方法是研究现有协作代码，然后复制其现有代码。
The second way is to explore the existing collaboration code and then to copy existing code.
应用推荐