本文首先讨论语义角色的三种精细程度不一的分类层级，介绍它们各自在语言信息处理系统中的有关应用。
This paper firstly discusses three kinds of level in the fineness hierarchy of semantic roles, and introduces their application in some systems of natural language processing(NPL).
为了更好地管理垃圾数据，我们为数字对象定义了一个垃圾层级，并且为如何确定和分类垃圾数据提供了一个见解。
To allow better waste data management, we define a waste hierarchy for digital objects and provide insights into how to identify and categorize waste data.
汉语词的语法分类，应当按层级关系进行。
The grammatical classification for Chinese should have the level relationship.
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