In a nutshell, this research suggests that among retired NFL players with three or more career concussions, the incidents of early-onset dementing disease is much greater than it is for the general population.
在小范围内， 这个研究表明 在退役的NFL运动员中 有三次或更多次职业性的脑震荡， 早期痴呆症的概率 比普通人更大。