Detailed Instructions: You are given a sentence in Galician. Your job is to translate the Galician sentence into English.
Q: Pero aos cincuenta anos, teremos renovado todas as neuronas desta estrutura coas que nacimos con neuronas nacidas sendo adultos.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
But by the time we turn 50, we will have all exchanged the neurons we were born with in that structure with adult-born neurons.