Sеперь стало всё ясно, большое спасибо за помощь в этом вопросе.
Since stem cells {have|possess|have developed} {high|highest} efficiency, the #file_links<>C:UsersAdminDesktopfilegsa+en+Georgiy10k40k2805252URLBB.txt",1,N] is low, and {there is|is|is} a small {probability|chance} that they {should|can} {become|be|turn into} wrong cells {or even|or even they can form tumors.