translation.en: Dan Koditschek put some steel nails -- very simple version -- on the robot, and here's RHex, now, going over those steel -- those rails. No problem!
translation.zh: 丹•柯蒂斯将一些钢钉——非常简单的型号——装在机器人上—— 于是现在的RHex，越过那些钢制的——轨道。没有问题！