This paper briefly introduces the classification of words and part-of-speech tagging, then introduces a computer model of syntactic processing: context-free grammar.

本文将简要介绍单词的分类与词类标注的相关内容，在此基础上介绍句法处理的一个计算机模型：上下文无关语法。

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Features for classification might include words, weights for those words (based on frequency, for instance), parts of speech, and so on.

分类功能的特性可以包括词汇、词汇权重(比如说根据频率)和语音部件等。

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For example, a simple approach to classification might keep track of the words associated with a label, as well as the number of times those words are seen for a given label.

举例来说，一种简单的分类方法可以跟踪与标签相关的词，以及这些词在某个标签中的出现次数。

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