translation.en: And when you have a population of fast-dividing cancer cells, if one of them acquires new mutations, which allow them to grow more quickly, acquire nutrients more successfully, invade the body, they'll be selected for by evolution.
translation.zh: 在一群快速分裂的癌细胞中 如果一个细胞获得新的突变 从而更快的繁殖 更好的吸收营养 侵入机体 他们则被自然保留