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对一个问题或领域，从不了解到了解，从了解到熟悉，从熟悉到精通，这记录了K.K思考和解决问题的成长过程。
On an issue or area, never learned to understand, from the learned to be familiar with, from the familiar to the master, this blog records the K.K's growth by thinking and solving problems.
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