equilibrium radius

例句：

1. 1.The equilibrium radius is the distance at which two objects are in equilibrium.
   平衡半径是两个物体处于平衡状态的距离。
2. 2. The equilibrium radius of a planet is its distance from the sun.
   行星的平衡半径是它与太阳的距离。
3. 3. The equilibrium radius of an object is the distance at which it will not move any further.
   物体的平衡半径是它不会进一步移动的距离。