allowed orbit

例句：

1. 1. The satellite's orbit is carefully monitored to ensure its stability.
   卫星的轨道被仔细监控以确保其稳定性。
2. 2.The spacecraft's allowed orbit is crucial for its survival.
   航天器的允许轨道对其生存至关重要。
3. 3. The planet's orbit is determined by the force of gravity and the rotation of the Earth.
   行星的轨道由引力和地球的旋转力决定。