And then, once you hit the threshold where the mutation rate is so high that you cannot self-reproduce, you cannot copy the information forward to your offspring without making so many mistakes that your ability to replicate vanishes.
升高到可行阈值 突变率太高了 就无法自我繁殖 不能将信息 没有错误地 复制给后代 复制的能力就消失了