theory of representation造句

it's regrettable that traditional theory of representation lacks system research of that of legal person and in practice dealing with issue of legal person and legal representative by referring to the theory of agency system
然而，令人遗憾的是，传统的代表理论缺乏对法人代表问题的制度性研究；实践中对法人及法人代表问题的处理，主要是借助代理理论来进行的。
secondly, it discusses theories of representation of graph characters, tcp / ip protocol and three layers system structure, based on which we give a notion modal of instant messenger based on graphs . there are three-layer and based on tcp / ip system structure and function modals consisted of user management modal, graphs communicating modal and history record modal etc . in this notion modal
在理论研究的基础上提出了基于图形的即时通信系统的概念模型，在该模型中描述了采用三层系统结构、基于tcp/ip协议进行网络通信的系统结构模型和包括用户管理、图形交流、历史记录等模块的功能模型。
It's difficult to find theory of representation in a sentence. 用theory of representation造句挺难的