swinging radius

例句：

1. 1.The swinging radius of the pendulum is 2 meters.
   摆的摆动半径是2米。
2. 2. The swinging radius of the pendulum is 2 meters.
   摆的摆动半径是2米。
3. 3.The swinging radius of the pendulum is 2 meters.
   摆的摆动半径是2米。