why we need understand Concepts

This is the only way to build our question ability, which is the most important ability in AI age.

协议、实现、签名

很多场景下，需要用协议vs实现去区分理解编程世界的一些东西。 比如EMCAjs与具体的编程语言，http与具体的包。 很多混乱、迷糊，来自于分层的不明确。