translation.en: Now that might sound bad, but actually this is a really important developmental process, because gray matter contains cell bodies and connections between cells, the synapses, and this decline in gray matter volume during prefrontal cortex is thought to correspond to synaptic pruning, the elimination of unwanted synapses.
translation.zh: 在前额叶皮层会出现一个明显的下降 听起来似乎有些不安 但这确实一个极其重要的发育阶段 因为大脑灰质包涵了细胞体 还有细胞之间的联系，也就是突触 在前额叶皮层到了一个需要对突触进行修剪 去除掉一些不必要的突触的这一阶段 大脑灰质也就会减少