18. An active learning training system, comprising: a processor for creating or updating a parallel corpus of a machine translation system; a translation module for translating a test set E from a first language to a second language using a unidirectional translation corpus, and translating the test set back from the second language to the first language using a unidirectional translation corpus so as to create set E′ in the first language; a comparison module for computing confidence scores for the translation of each item in the set based on the similarity of E and E′ and adding the translations with the highest confidence scores directly to the parallel corpus without presenting the translations to a human translator for correction; memory storage for storing the created or updated parallel corpus; and a user interface to allow a user to interact with the active learning training system.
19. The system as recited in claim 18 further comprising a connection port configured for communications with a machine translation device.