He identified creating a hand as one of the three most difficult problems facing makers of humanoid robotics. The other two were creating an artificial intelligence that allowed the robot to comprehend the world, and making robots in large numbers.
（四）核反应堆，是指为了利用核反应产生的能量、中子、核素等建设的装置。
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And you won't need to top up manually in the hard to reach corners, this vacuum has edge-to-edge cleaning that makes sure you get a better coverage along walls and corners. It also comes with an OMNI docking Station. Here the vacuum does all its maintenance, including mop washing and drying, water refilling, and dust emptying for up to 150 days. So there's really next to no work for you to do.