纯洁: pure, clean and honest, to purify...
火箭: rocket...
老百姓: ordinary people, the person in the street...
人文: humanities, human affairs, culture...
西北: northwest...
遗传: heredity, to inherit (a trait), to pass on (to one's offspring)...
换成: to exchange (sth) for (sth else), to replace with, to convert into...
反之: on the other hand..., conversely......
类似: similar, analogous...
