10. The method for establishing paraphrasing data for a machine translation system of claim 1 , wherein the confirming and storing the paraphrasing lexical patterns in the paraphrasing DB comprises: extracting the source language sentences that include the paraphrasing target sentence from the bilingual corpus; extracting the paraphrasing sentences that include the final paraphrasing candidate from the bilingual corpus; and confirming the paraphrasing target sentence and the final paraphrasing candidate as the paraphrasing lexical patterns based on the object language portions of the source language sentences and the paraphrasing sentences.
1. A method for establishing paraphrasing data for a machine translation system comprising: selecting a paraphrasing target sentence through application of an object language model to a translated sentence that is obtained by machine-translating a source language sentence; extracting, from a corpus DB for the source language, paraphrasing candidates that can be paraphrased with the selected paraphrasing target sentence; performing machine translation with respect to the extracted paraphrasing candidates; selecting a final paraphrasing candidate from the extracted paraphrasing candidates by applying the object language model to a result of the machine translation with respect to the extracted paraphrasing candidates; and confirming a paraphrasing relationship of the paraphrasing target sentence and the selected final paraphrasing candidate as paraphrasing lexical patterns using a bilingual corpus and storing the paraphrasing lexical patterns in a paraphrasing DB.