2. The method of claim 1 , wherein the generating of translation neighbors comprises applying a set of operators to the target sentence, each of the operators generating at least one translation neighbor from the target sentence.
2. The method of claim 1 , wherein the generating of translation neighbors comprises applying a set of operators to the target sentence, each of the operators generating at least one translation neighbor from the target sentence. 3. The method of claim 2 , wherein the set of operators includes at least one of: a remove operator which removes at least one target word from the target sentence; an insert operator which inserts a word in the target sentence when a sequence of n words in the target sentence is not found in a language model; a replace operator which replaces at least one of the target words in the target sentence with target words of a biphrase which matches at least one of the source words in the source sentence; and a shift operator which shifts a position of a target word to at least one different position in the target sentence.