So, parabiosis is done in mice by surgically connecting the two mice together, and that leads then to a shared blood system, where we can now ask, "How does the old brain get influenced by exposure to the young blood?"
我们已经实现了老鼠的连体共生， 就是通过手术将两只老鼠 进行生理上的连通， 使它们的血液循环互通， 这样我们就可以问， “将老年大脑置于年轻血液之中， 它会受到怎样的影响？”