求翻译：虽然癌症起始于一个细胞突变，但是这个突变细胞的后代必须经过几次突变，才能形成癌细胞。流行病学的统计表明，癌症的发病率随年龄的增长而提高，而且是几何级数提高，癌症的发病率是年龄的3次方、4次方甚至5次方。癌症的渐进发生过程非一日之寒，需要数年时间是什么意思？

Although cancer begins with a mutation, but the mutant cells must undergo several mutations in the offspring, in order to form cancer cells. Epidemiological statistics show that the incidence of cancer increased with age, and is geometrically increased, the incidence of cancer is the power of the ag

Although cancer starts in one of the cells, but the mutation mutation of stem cells must pass through several mutations, future generations will be able to establish cancer cells. epidemiology of cancer statistics indicate that the incidence rate of growth with age, but is increasing geometrically i

Although a cancer date from cellular mutation, but this sudden change cell descendant must experience several sudden changes, can form the cancer cell.The epidemiology statistics indicated that, cancer disease incidence rate enhances along with the age growth, moreover is the geometric series enhanc

Cancer starts at a cell mutations, but this mutant cell mutation progeny must be after several, to form cancer cells. Epidemiology and statistics show that incidences of cancer growth increases with age and are geometric series increasing, incidence of cancer is age of 3, 4 or even 5-th. The gradual

Although the cancer starts with an cell mutation, but the mutant cells must be descendants of a couple of mutations, to form a cancer cell. Epidemiology and statistics show that incidences of cancer growth increases with age and are geometric series increasing, incidence of cancer is age of 3, 4 or