inferior orbitals

例句：

1. 1. The spacecraft's inferior orbitals are designed to provide data for the astronauts.
   该航天器的次级轨道器设计用来为宇航员提供数据。
2. 2. The suborbital flight of the space shuttle is a testament to human achievement.
   太空穿梭机亚轨道飞行证明了人类的成就。
3. 3.Inferior orbitals are crucial for maintaining communication with Earth during long-duration missions.
   在长时间的任务中，次级轨道器对于与地球保持通讯至关重要。