spacecraft long-term operation management

例句：

1. 1. The astronauts are preparing for their long-term space mission.
   宇航员们正在为他们的长期太空任务做准备。
2. 2. The spacecraft isscheduled to land on the moon tonight.
   这艘宇宙飞船计划今晚降落在月球上。
3. 3. The spacecraft's landerhas successfully landed on the surface of Mars.
   这艘宇宙飞船的着陆器已经成功地降落在火星的表面。