This dissertation makes a relatively explorative and comprehensive study on the semantic naturalness degrees of English syntactic constructions through analysis of three explanatory devices from a cognitive perspective, namely, cognitive resemblance, categorical prototypicality and wide distribution.

By introducing several typical examples in earthquake isolation of building structures in Japan,the trends in Earthquake Isolation techniques of building Structures are summarized,and meanwhile,its prospects in china and several problems needed to be solved are indicated.

Based upon the teaching practice,this paper holds that important typical examples play important roles in the teaching practice of Calculus.

On the basis of an extensive collection and analysis of the related data and survey of the survival architectures,the authors deeply research its typical examples,then analyze its characteristics of space,form,material,equipment and decoration,finally summarize the value of Xi\'an modern times mansion architectures in both historical and architectural aspect.