12. The apparatus of claim 9 , wherein the translation knowledge acquiring module comprises: an extractor for extracting translation knowledge of words and syntaxes, which receives the results of the word and syntactic alignment, extracts translation information on the words and syntaxes, and stores the extracted translation information; an extractor for extracting translation knowledge on a subcategory of a bilingual inflected-word, which searches an inflected word serving as a head word by using information on dependency relationship in the source-language sentence, searches parallel-translation of each word and syntax of the source-language sentence in the target-language sentence after forming a subcategory frame of the inflected word by tracking a word and syntax that depends on the inflected word, and extracts the translation knowledge on the subcategory of the inflected word by connecting the parallel-translation of the word and syntax to the subcategory frame of the inflected word; and an extractor for extracting translation knowledge of a subcategory of a bilingual sentence pattern, which extracts a translation pattern with a sentence using an idiomatic expression and stores the extracted translation pattern.
9. An apparatus for constructing translation knowledge, comprising a converting section that converts a source-language sentence and a target-language sentence by receiving the source-language sentence and the target-language sentence corresponding to the source-language sentence and attaching a prototype, a part-of-speech, relative position information, and syntactic information in a base phrase to each morpheme of the source-language sentence and the target-language sentence; a word-syntax aligning module that aligns words and syntaxes by applying a previously held bilingual dictionary and an algorithm for unsupervised learning; and a translation knowledge acquiring module that acquires translation knowledge on a word and syntax, translation knowledge on a subcategory of a bilingual inflected-word, and translation knowledge on a bilingual sentence pattern based on results of syntactic alignment by the word-syntax aligning module, wherein the word-syntax aligning section comprises: a word aligning section that outputs a plurality of results of the word alignment by searching words corresponding to each other in the source-language sentence and the target-language sentence with respect to the pairs of the plurality of reconstructed sentences, after reconstructing the converted source-language sentence and target-language sentence by using at least one of a surface type, a prototype, and a part-of-speech of a morpheme, and generating pairs of a plurality of reconstructed sentences; a post-processor for post-processing the word alignment, which corrects the results of the word alignment by using the previously held bilingual dictionary and that determines a proper word alignment as a word alignment that is obtained by, with respect to the plurality of results of the word alignment, excluding the corrected word alignment results and taking an intersection set; and a syntax aligning section that performs the syntactic alignment by using the result of the proper word alignment and information on dependency relationship between the syntaxes.