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。
Buddhist perspectives on equality represent a fundamental principle of Buddhism. It not only reflects the way of stepping into nirvana, but is embedded through actual experience.
“平等观”是佛教的根本要义之一，它既是佛教的一个观照法门，也是开悟后的一种真实体验。
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