You'll never reach true Open Closed nirvana, but you can inch much closer by rigorously following the related Single Responsibility Principle: a class should have one, and only one, reason to change
你永远也达不到真正的开闭天堂，但是通过严格地遵循与之相关的单一责任原则：一个类应该有并且只有一个更改的理由，你可以非常靠近地接近它。
Footnotes should be typed single spaced at the bottom of the appropriate page and separated from the text by a 3-inch line starting from the left margin with one space above and below it.
脚注应键入单一间距在底部的适当的页数和分开的案文的一个3英寸线从左侧开始保证金与以上及以下这一空间。
应用推荐