changes什么意思啊,Engram的意思是什么？

engramn.记忆的痕迹changes什么意思啊；记忆印迹印痕；记忆痕迹复数：engrams 例句1.One theory holds that memory traces or fragments are distributed throughout the brain as biophysical or biochemical changes called engrams.一种被称为记忆印记的理论认为，记忆的痕迹或碎片以生物物理变化或生物化学变化的形式分布于整个大脑。2.To detect engrams, Hubbard adopted a battery-powered galvanometer with a needle dial wired to two empty tin cans.为了探测记忆印痕，哈伯德采用了一种电池驱动的电流计，它有一个指针可调节，连接着两个空罐头盒。3.The exact mechanism underlying engrams is not well understood.然而记忆印记理论的确切机制还不清楚。