synchronous equatorial orbit

例句：

1. 1.The satellite's orbit is synchronous with the Earth's rotation.
   卫星的轨道与地球自转同步。
2. 2. This synchronous orbit allows for efficient communication between spacecraft.
   这种同步轨道使得太空船之间的通信高效。
3. 3.The synchronous orbit of a satellite is determined by its position relative to the Earth's axis.
   卫星的同步轨道是由其相对于地球轴的位置决定的。