Walking with Mu Nan had been very uncomfortable and distressing, but Mr. Su Bai felt that, although he could clearly sense the radiation around him becoming stronger constantly, and it had reached a terrifying level, it was still within his barely tolerable range, without causing any other noticeable discomfort.
Perhaps this was because he had experienced radiation before, so his body's resistance to radiation had been strengthened.
The human body, even in the modern societal understanding, is considered very fragile: unlike cheetahs in speed, and lions in strength, humans in nature, without the aid of external objects, would probably just become a feast for the real carnivores.
But in reality, the human body's ability for self-repair and self-evolution is quite apparent, such as with some epidemic diseases—once you've experienced them, antibodies are produced in your body, and the likelihood of getting sick again becomes extremely low.
