They have a center,and arms of matter that seem to circle the center like a pinwheel.

VOA: special.2009.04.29

In fact, certain areas of the skin would be impacted most, most dramatically, the face and the chest, the arms, but more distal point of the arms, like the palms of your hands.

事实上,皮肤某些区域将受到严重伤害,尤其触目惊心的是,在面部,胸部和手臂位置,很多都出现在手臂的末端,比如手掌上

耶鲁公开课 - 生物医学工程探索课程节选

We look out, we see where we like to go, we know where our arms are at, we take that information to the rear part of the brain, they were within visual, which start forming initial plans to move our arms, we elaborate those plans.

我们去看外界，我们看到自己想去的地方，我们知道自己胳膊的所在，我们将这一信息传递给大脑后面，负责视觉的部分，该部分开始为我们移动胳膊制定最初的计划，我们详细描述这些计划。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

His throat was powerless. His arms and hands were like lead.

VOA: special.2009.10.31

"On station one,we have robot arms. And what happens is the robots have different joints like a human arm -- one at the shoulder,one at the elbow, wrist and then a claw.

VOA: special.2010.07.28