I am almost to cut your arm to descend afterward time.

我下次可就要将你的手臂斩下了。

youdao

This again is a guy, he went into town to salvage, I feel he descend a long time, finally he float in when I saw his hand and an arm.

这时候又来了一个外地小伙子，他继续下水去打捞，我感觉他下潜了很长时候，终于在他浮上来的时候我看到他手里还有一个胳臂。

youdao

And those plans and commands descend down this spinal cord to drive the muscles in our arm, to guide the arm where we like it to go.

这些计划和指令沿着脊髓而下,驱动我们胳膊的肌肉，指挥我们的胳膊按意志活动。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选