23. The method of claim 19, wherein the probability of the fertility of the source word is determined using a deleted interpolation 4-gram model.
19. A method for translating a series of source words in a first language to a series of target words in a second language, comprising the steps of: inputting the series of source words; generating at least one fertility hypotheses for a fertility of a source word, based on a source word and a context of the source word; generating sense hypotheses for a translation of the source word, based on the source word and the context of the source word; determining a probability of a fertility of a source word, based on the source word and the context of the source word; determining a probability of a target word being a correct translation of the source word, based on the source word and the context of the source word; and generating a list of target words for the translation of the source word, based on the probability of the fertility and the probability of the target word.