As a proposal to start a new column of ontology to study Chinese vocabulary and its law of development, the present paper makes an investigation, from ontological viewpoint, into the basic motive and internal law of meaning extension and word derivation system in the course of the formation of the noun shi(time) .

In English,derivative and simple words make the result,while in Chinese,it remains on compound words.

This paper observes a batch of derivatives which tend to be forgotten in modern Chinese:whose affixes are the survivors from middle and modern ancient times and have lost powerful deriva-tively,but we can not deny that this batch of words formed by affixes from middle and modern ancient times are a special group in modern Chinese derivatives.

The Chinese derivatives ended with the Chinese ending "-Hua" can be translated into English by means of either "literal translation" or "liberal translation" in accordance with their context.

Derived predicate is one of two new features of PDDL2.

The Features of Medical English Derivatives and Exploration of their Teaching Methods;

This paper discusses the usage and the E-C translation skills of the word "refer" and its derivatives in business English from semantic and pragmatic perspective.

Secondly, there are many derivatives in Chinese single-morpheme words, and both the sounds and the meanings of them derived from their cognations, so they are motivated words, too.

Acquisition of derivational affixes is an important criterion for the capability of vocabulary development while input of derivational affixes is a prerequisite condition of derivational affix acquisition.