The system of language is made of the system of arbitrary conception and the system of metaphorical conception.

By analyzing the reason for the failure of Chinese private-enterprises which failed and referring to experiences of foreign successful enterprises,this article puts forward the basic suggest that it is necessary to realize the scientific management of the Chinese private enterprises that we must build up systemic concept and realize the systemic management of these enterprises.

On the basis of elaborating the concept system of WUE, the calculating models for WUE at different levels were made clear so as to further the study of WUE, which could provide the scientific basis for the high efficiency of agricultural water use and agricultural su.

Knowledge-based problem solving requires a concept system which contains rich semantic, and this concept system, as well as its reasoning mechanism is also the core of human\'s cognitive system.