connections between neurons grow like crazy and they--

神经元之间的联结也在疯狂的生长
and this process of synaptic growth

这个在不同突触间
where there are the connections across different synapses

形成联结的突触发育过程
peaks at about two years.

在两岁时达到顶峰
Finally, remember myelination,

最后回想一下髓鞘的形成
where you sort of get this fatty sheath

你会在哪里长出脂肪鞘
over your neuron

去包裹神经元
to make it more effective?

使得神经元更有效率
That also happens through development,

髓鞘的形成也同样发生在发展过程之中
and in fact, it goes through development

实际上髓鞘的形成贯穿整个发展过程
and even teenagers are not fully myelinated.

即便是青少年的髓鞘也并未完全发育完善
In particular, they're not fully myelinated in their frontal lobes.

特别是他们额叶的髓鞘并未完全发育