The derivable way of vocabulary means the way to create new words. That is the pattern of making words. While disyllabic words are classified from the form of speech sounds. Inspecting the developing and evolving process of the vocabularies, an obvious tendency will be found in syllabic language in Chinese: The disyllabic words are more than the monosyllabic words, and obtain the absolute predominance in the end. In the derivable process, a great many disyllables are developed. The most effective and direct way to reveal the causes of disyllables is to investigate the disyllables. Therefore, we explore the contradictory relationship between the language inside and the outside factors affecting vocabularies development, in order to explain the basic reason of causing disyllables. |