BRAVE NEW WORLD (I)

Reading this first part and chapter of Brave New World I am strangely confused and hooked at the same time. Reading the process of this some sort of mechanical human breeding that seeks to  make as many twins, or exact copy humans as possible and how they do it automatically triggers many questions. How can they do this , I can't understand these words used to describe it, and why would would they want to do it to name a few. I may not have any idea to the answers or whats going on, but I do want to read more.