The system of servants, especially the system of official servants is only a part of the hierachical system of liangjian status.

奴婢制度尤其是官奴婢制度，只是良贱身份等级制度的一部分。

As following, the language modeling techniques for expert search were discussed in a hierachical way.

实现了两种基于语言模型的专家检索基本方法，并应用分层剖析法加以分析比较。

Gypsum was used as raw material to prepare porous hydroxyapatite with hierachical structure by hydrothermal reaction.

使用石膏作为原料,通过水热反应得到具有特殊结构的多孔羟基磷灰石.

This paper deals with the question of information representation for spindle units by using the hierachical coding system.

使用分层编码系统表达主轴部件的信息，用海明距离进行模糊决策以选择较优的主轴部件设计方案。