写这篇文档主要是想对刚接触Mina的人讲解一些Mina的基本知识，由浅入深，一步一步的学习Mina思想的精髓，-I wrote this document are mainly new to Mina who would like to explain some of Mina' s basic knowledge of implemented progressively, step by step learning Mina thought the essence of