在本章中主要介绍如何判断LR文法，详细介绍计算机在分析LR的思想，以及相关的FIRST,FOLLOW,SELECT的分析方法，并附加了解释各种FIRST,FOLLOW,SELECT的例子，简单易懂-In this chapter describes how to determine the main LR grammar, detailed computer analysis of the idea of LR, as well as FIRST, FOLLOW, SELECT method, and additional explanation of the various FIRST, FOLLOW, SELECT example, easy-to-read