1. 派生：根据构词法中词的转换(conversion),派生(derivation),合成(compounding)来猜测词义.在上精读课时,强化词汇分析技能,使学生掌握基本的构词方法,扩大词缀范围,掌握一些常用的前缀、后缀.

2. 导出：它的一个同义词是导出(derivation). 演绎是相对于系统的概念,说一个公式(或语句)是演绎的只是相对于一不定的公理和推理规则的具体系统而言的. 演绎概念是证明概念的概括. 一个证明是语句这样的有穷序列:它的每个语句或是公理或是根据推理规则由前面的语句得出的.

1. 起源;由来;(尤指)词源
    The derivation of something, especially a word, is its origin or source.

911查询·英语单词

    e.g. The derivation of its name is obscure...
           其名字的由来鲜为人知。
    e.g. The word is of old French derivation.
           该词源于古法语。

1. the act of deriving something or obtaining something from a source or origin

2. drawing off water from its main channel as for irrigation

3. drawing of fluid or inflammation away from a diseased part of the body

4. inherited properties shared with others of your bloodline

    Synonym: ancestrylineagefiliation

5. a line of reasoning that shows how a conclusion follows logically from accepted propositions

6. (historical linguistics) an explanation of the historical origins of a word or phrase

    Synonym: derivingetymologizing

7. the source or origin from which something derives (i.e. comes or issues)

    e.g. he prefers shoes of Italian derivation
           music of Turkish derivation

8. (descriptive linguistics) the process whereby new words are formed from existing words or bases by affixation

    e.g. `singer'' from `sing'' or `undo'' from `do'' are examples of derivations