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

髓磷脂是神经轴突周围的保护性鞘膜，能快速传导神经冲动。

They're kept out of harm's way within these protective sheaths, but when he needs to use them, the Mega Lion would swing them into action, like switch-blade knives, and could slice up prey.

它到保护性鞘膜内时不会受到损坏，不过当拟狮要使用它时，就会把它探出来，就像弹簧折刀一样，还能切开猎物。