return altitude

例句：

1. 1. The plane returned to its cruising altitude after landing.
   飞机着陆后返回了巡航高度。
2. 2. The climber returned to his previous altitude as the sun set.
   随着太阳落山，登山者回到了他之前的海拔高度。
3. 3. The hikers returned to their starting point after completing the trail.
   在完成徒步旅行后，徒步者们返回了起点。