The second is automated ground stations that the vehicles fly in and out of to swap batteries and fly farther, or pick up or deliver loads.
第二个是飞行器起飞和降落的自动化地面站， 第二个是飞行器起飞和降落的自动化地面站， 在那里它们可以更换电池以飞得更远， 或收发货物。