在索引更新过程中，词法分析确定文档中单词的词元。
During index update processing, the lexical analysis identifies the lemmas of the words in the document, and the analysis adds this information to the text index.
句法注意：在本章和之后的章节中，描述句法时使用与词法分析时不同的扩展BNF记法。当某个句法规则(可能是可选的)具有如下形式。
Syntax Notes: in this and the following chapters, extended BNF notation will be used to describe syntax, not lexical analysis. When (one alternative of) a syntax rule has the form.
在状态转换图的基础上，构造词形表，为每个状态设计一段处理程序，使词法分析能从字符串中识别单词。
At the base of converted-state chart, building morphology table, designing a section of program for every status, in order to enable lexical analysis to recognize word from character string.
经过对《文字生涯》的翻译风格进行分析，可以发现译者在词法和句法上分别采取了归化和异化的翻译策略。
Through analyzing the translation style of les Mots, we find that the translator adopted domesticating method and foreignizing method for translating the words and the sentences.
该方法建立在词法和句法基础上，从语境角度分析歧义字段，提高分词准确率。
The method improves the accuracy of word segmentation, by combining morphology and syntax with language situation.
在论文的第三章，针对词法分析工具误报和漏报的情况，设计了一个词法检测的优化方案，其中包括综合评价系统和结果优化系统两大模块。
In the third chapter, an improved scheme is designed against false positive and false negative of lexical tools, which includes integrated assessment system and results optimization system.
在论文的第三章，针对词法分析工具误报和漏报的情况，设计了一个词法检测的优化方案，其中包括综合评价系统和结果优化系统两大模块。
In the third chapter, an improved scheme is designed against false positive and false negative of lexical tools, which includes integrated assessment system and results optimization system.
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