Q-joint

例句：

1. 1. The scientist used a Q-joint to connect the robot's arms together.
   科学家使用一个关节将机器人的手臂连接在一起。
2. 2. The car had several Q-joints that made it easy to move around in tight spaces.
   这辆车有几个关节，使得在狭小空间内移动变得容易。
3. 3. The engineer designed the Q-joint to provide a smoother, more efficient movement for the robot.
   工程师设计了这种关节，为机器人提供更平滑、更有效的运动。