Myelin is the protective sheath that surrounds the axons of neurons, allowing them to quickly send electrical impulses.

髓磷脂是神经轴突保护性鞘膜，能快速传导神经冲动。

And in the mid-1900s, electron microscopy further supported this idea by revealing a membrane around each nerve cell keeping it separate from its neighbors.

1900 年代中期，电子显微镜通过揭示每个神经细胞膜使其与相邻细胞分开，进一支持了这一想法。

Now remember back how every neuron in your body has a membrane that keeps positive and negative charges separated across its boundaries, like a battery sitting around waiting for something to happen?

还记得你体内每个神经元是如何有一层膜将正电荷和负电荷隔开边界，就像一个电池静静地等待事情发生一样？

The trigeminal nerve normally transmits touch, temperature, and other sensations from the skin to most of the face, part of the scalp, and some of the blood vessels and layers covering the cerebral cortex.

三叉神经一般会传递来自大部分脸部皮肤、部分头皮、以及覆盖大脑皮层一些血管和膜层触觉、温度和其它感觉。