Getting a robot to navigate across a cluttered room is difficult enough without having to take into account what its various limbs or appendages might bump into along the way.

• 单单让一个机器人在杂乱的房间中自由识别方向前进已令科学家们挠头不止，而且并没有考虑到它各种各样的机械手臂和附件将会在沿途撞上什么东西的复杂状况。