It defines the UT functionally as textual unit instead of language unit which maintains its textual integrity by performing three functions, viz.

They hold different views on language units and meaning realization,among which the general principle is that clauses realize situations while nominal groups realize things.

This paper announces the practicality of research of language unit.

To eliminate the confusion over the problem of UT, the various speech units involved in translation should have names of their own, with UT as their superordinate concept.

As a Langackerian linguistic unit,as+X is at the same time a construction,whose form and meaning can never be predicted from either its constituents or other constructions because of its flexibility in form and independent meaning when treated as a whole.

The meaning of a sentence is a system,which is formed by four kinds of semantic units,namely,semantic feature,semantic word,semantic group and semantic sentence.

The semantic system of modern Chinese is composed of three key elements, namely, semantic units,the structural relations between them, and structural hierarchy.

This paper discusses the concepts and the structure of the menu driver system,presents the implementation technique of the menu driver system that is applicable to mixed-language programming,designs a terse and concise menu description language.