english: So when we reached this point, we had some other challenges, from both an engineering as well as a usability perspective, to make sure that we could make it used practically.
non_english: Kada smo došli do ove tačke, imali smo neke druge izazove, kako iz perspektive inženjeringa, tako i upotrebljivosti, da bismo bili sigurni da mogu praktično da se koriste.