translation.en: You know, I have a lot of cocky freshmen at MIT, so I tell them, "Oh, your bodies are really getting stronger and stronger, but in your late twenties and mid-thirties, cells, they die."
translation.zh: 在MIT时，我见过很多自以为是的新生，所以我告诉他们， “你们的身体的确越来越强壮， 但是在你二十岁的末期和三十岁中期，细胞就开始死亡了。“