Both in Chineseand English culture,the connotations and symbolized meaningsof color vocabularies is used differently,thus requiring people to understand the usage of color expressions completely;Not only can these expressions enlarge our language,but add to the possibility of successful intercultural communication.

The paper puts forward four methods to understand the word meaning correctly To understand the word meaning by word matching, context clues, grammatical characteristics and extended meaning.

The paper investigates the development of the extended meanings of the Chinese expression piru(譬如), particularly when it is used as synonymous to dangzuo(当作)or yaoshi(要是).

Transformation in English-Chinese translation——method of extension;

There are two contributions XU Kai has made to the theory of extension of word meaning: First,based on XU Shen s The Six Categories of Chinese Characters and the relationship between borrowed meaning and original meaning,XU Kai categorized the borrowed words,which helped the Qing linguists to further define the concepts of loan and extension,and to straighten out the relationship between the two.

The difference is illustrated in this paper by a large number of examples based on the extension of words meaning,the development of melonymy,etc.

In this paper,an irrational inequality is generalized and extended in many-sided,a class of new irrational inequalities are established,which are interesting and useful.

For instance,some common words which have no medical meaning need to be extended to conform to the ex pression of medical science; the long and complic.

We will find that because Chinese is an isolated languge, compared with Indo-European languges, there are three differences of semantic changes in Chinese: first, semantic extended in Chinese doesn’t limit in some meaning’s domain; second, different type of subjective reasoning can impact semantic change of the same word; and the last, the meanings of Chinese can only increase, but not reduce.

In the reproduction in receptor language of the original message ,the way of extending is often used to render the translation to be in line with the idiomaticness of the target language and to overcome the untranslatability by changing grittiness into coherence.

The research starts from the original meaning of Neo-Confucianism with the examples of the semantic broadening,and expounds the way and ground of extending the semantic meaning.

Research into semantic extensions help deepen our understanding of such relations.

Denominalization refers to the conversion of nouns to verbs or adjectives and is a common type of semantic extension in Chinese,which was not discovered in the past as it had been discussed under other types of extension.