请阅读第一段文本（Text 1），判断并选择你认为该文写作的目标读者是谁？Naked mole-rats appear to have a high resistance to tumors; cancer has never been observed in them. A potential mechanism that averts cancer is an "over-crowding" gene, p16, which prevents cell division once individual cells come into contact (known as "contact inhibition"). The cells of most mammals, including naked mole-rats, undergo contact inhibition via the gene p27 which prevents cellular reproduction at a much higher cell density than p16 does. The combination of p16 and p27 in naked mole-rat cells is a double barrier to uncontrolled cell proliferation, one of the hallmarks of cancer. On June 19, 2013, scientists reported that the reason naked mole-rats do not get cancer maybe because they produce an "extremely high-molecular-mass hyaluronan" (HMW-HA) (a natural sugary substance), which is over "five times larger" than that in cancer-prone humans and cancer-susceptible laboratory animals. The breakthrough scientific report was published a month later as the cover story of the journal Nature. A few months later, the same University of Rochester research team announced that naked mole-rats have ribosomes that produce extremely error-free proteins. Because of both of these discoveries, the journal Science named the naked mole-rat “Vertebrate of the Year” for 2013.