translation.en: If you hit your thumb with a hammer, these wires in your arm -- that, of course, we call nerves -- transmit the information into the junction box in the spinal cord where new wires, new nerves, take the information up to the brain where you become consciously aware that your thumb is now hurt.
translation.zh: 如果你用锤子敲大拇指， 你手臂里的电线——当然，我们称为神经—— 在脊髓里传递信息到接线盒 新电线，新的神经 把信息运送到大脑 因此你能自觉意识到你的大拇指受伤了。