<prompt> Translate the following text to EnglishKwa hiyo, kwa sababu ya muundo usio mkamilifu, makombora ya maendeleo yaliyotengenezwa mwanzoni yalifanywa kwa mikono, yalichukua muda mrefu kujenga kuliko ilivyopangwa, na yalikuwa na ubora duni.  <response>: Therefore, because of the immature design, initially manufactured development missiles were hand-made, took longer to build than planned, and suffered from poor quality. 