 When a translator segments a text into translation units, the larger these units are, the better chance there is of obtaining an idiomatic translation.This is true not only of human translation, but also in cases where human translators use computer-assisted translation, such as translation memories, and also when translations are performed by machine translation systems.Vinay and Darbelnet took to Saussure's original concepts of the linguistic sign when beginning to discuss the idea of a single word as a translation unit.