translation.en: We built our own arm at the Rehab Institute of Chicago where we've added some wrist flexion and shoulder joints to get up to six motors, or six degrees of freedom.
translation.zh: 我们在芝加哥的康复中心做了我们自己的假肢 加入了几个手腕弯曲和肩膀关节 有了六个机械部分 或者说有了六个自由度了