我们现在去主要的收藏大厅，让我们看下车在加速传递中发挥的作用。
Let's proceed to the main exhibit hall and look at some of the actual vehicles that have played a prominent role in speeding up mail delivery.
所有这些都是天然的和合成的，通过阻止沿着脊髓和大脑的神经公路加速传递的疼痛信号进行工作。
All of them, natural and synthetic, work by stopping pain signals from speeding along neural highways into the spinal cord and brain.
快速思考和反应也依赖胆固醇，因为这些蜡状分子构成的鞘使神经元绝缘和加速电传递。
Quick thinking and rapid reaction times depend on cholesterol, too, because the waxy molecules are the building blocks of the sheaths that insulate neurons and speed up electrical transmissions.
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