<prompt> Translate the following text to EnglishBadala yake, ni tathmini za jinsi siku zijazo zinaweza kuonekana ikilinganishwa na kesi ya kumbukumbu iliyofafanuliwa hapo awali - ikizingatiwa kujitolea kwa kitaifa kufikia upunguzaji wa uzalishaji, na ikizingatiwa mchanganyiko wa teknolojia na dhana za sera zilizojumuishwa katika kila moja ya matukio.  <response>: Rather they are assessments of how the future might unfold compared to a previously defined reference case - given a national commitment to achieve the emission reductions, and given the mix of technology and policy assumptions embodied in each of the scenarios. 