由于语言符号仅包含了它们的作用，和语意特征，前提是存在对它们的解释。
Since linguistic signs only carry out their functions or possess their semantic properties only insofar as there is a practice of interpretation.
它与笔译的不同之处在于，在语言的组织上，口译具有自发性的特征，而在语意的传达上，它则具有瞬间性。
Different from translation, it has the characteristics of being spontaneous in language organization and instantaneous in passing on the meaning.
特征提取采用底层信息和高层语意相结合的方法，弥补了相互的不足；
Take high level semantic information and low level picture visual characters as design patent characters, the two kinds of information cut down each other's shortage.
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