rotational degree of freedom

例句：

1. 1. The robot's ability to rotate its arms is crucial for its operation.
   机器人能够转动手臂的能力对于它的操作至关重要。
2. 2. The scientist used a new technique to measure the rotational degree of freedom of the object.
   科学家使用一种新的技术来测量物体的转动自由度。
3. 3. The engineer designed a system that can accurately measure the rotational degree of freedom of a machine.
   工程师设计了一个系统，可以准确地测量机器的转动自由度。