I hope that you can use the ideas presented here to build your own visitors in Clojure or your language of choice, and to continue exploring ways to structure and manipulate your data.
希望您可以利用本文介绍的概念，在Clojure或您选择的语言中构建自己的访问者，并继续探索构造和操作数据的新方法。
The choice of the data structure often begins from the choice of an abstract data type.
所选择的数据结构往往首先从选择一个抽象的数据类型。
Compare with metals material, engineering plastics are a sort of new type project structure material, and lack the complete theories method and data in design and choice of materials.
工程塑料是一种新兴工程结构材料，与金属材料相比，在选材、设计和使用方面缺乏系统完整的理论方法和资料。
Secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc.
详细叙述了通讯板接口模块的硬件结构设计，其中，对数据缓冲电路、数据传输速率选择电路、逻辑控制电路等各关键点做了重点介绍；
Secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc.
详细叙述了通讯板接口模块的硬件结构设计，其中，对数据缓冲电路、数据传输速率选择电路、逻辑控制电路等各关键点做了重点介绍；
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