Generally query analysis comprises several procedures such as morphological analysis syntactic analysis classification of query sentences keyword extraction and keyword extension and the like .

一般的，查询句分析需要进行词法、 句法分析以及查询句分类、关键词提取与 扩展等。

Question analysis includes lexical analysis question classification syntactic analysis keyword selection and keyword extension .

问题理解包括：词法分析、问题分类、 句法分析、关键词提取和 扩展。

Children acquire modal particles by means of imitation syntactic extension and pragmatic inference . Strategies of simplifying inclination and choosing the latter are used to acquire modal particles for children .

儿童通过模仿、 扩展和语用推理等手段，并运用 从简策略、择尾策略和倾向性策略逐步习得语气词。