Surrounding the grey matter is white matter, which consists of the myelinated axons of various neurons.

灰质周围的是白质，由有髓的神经元轴突构。

The white matter consists of myelinated axons, which are separated into tracts that carry information to and from the brain.

白质由有髓的轴突组，它们若干神经束，负责向大脑传递以及从大脑向其他部位传递信息。

The young brain is largely not myelinated. Myelin is the coating of nerve fibers that connect nerve cells.

年轻的大脑基本上没有髓。髓是连接神经细胞的神经纤维的涂层。

Frequently used neuronal pathways are myelinated, wrapped in a layer of insulation, allowing information to travel faster.

经常使用的神经通路是有髓的，包裹在一层绝缘层中，使信息能地传播。

White matter refers to connections that are myelinated, coated in a layer of insulation, allowing for fast far-range communication between information hubs.

白质指的是有髓的神经纤维，由一层保护层包裹，保证了信息中心之间的远距离速交流。

And although a big fissure separates the left and right hemispheres, the two halves communicate, through a series of myelinated axon fibers called the corpus callosum.

虽然左右半球之间有一条大裂缝，但这两半通过一系列有髓的轴突纤维——也就是所谓的胫骨体——进行交流。

Arrows shot from recurve bows fly, on average, around 240 kilometers per hour, which means that given a sufficiently long, myelinated, or large-diameter neuron, your thoughts actually could win the race.

由反曲弓射出的箭平均飞行速度大约是每小时 240 公里。这就意味着，只要神经元足长，且髓化或有较长直径的话，你的思维实际上可以赢得比赛。