robot-arm

n.机器手

roadside, roadway, roadworthiness, roadworthy, roam, roamer, roan, roar, roaring, roast, roaster, roasting, rob, rob sb. of sth., robber, robbery, robe, robin, Robinson Crusoe, robot, robotic, robotics, robust, robustly, robustness, rock, rock and roll (also ,rock 'n' `roll), rock salmon, rock'n'roll, rock-bottom, rock-cake, rock-climbing, rock-crystal, rock-garden, rock-plant, rock-salt, rock-steady, rocker, rockery, rocket,