flight line of aerial photography

例句：

1. 1. The pilot carefully adjusted the flight line to avoid obstacles.
   飞行员小心翼翼地调整航线以避免障碍物。
2. 2.The flight line is marked with a red dot on the map.
   飞行路线在地图上用红点标出。
3. 3.The flight line was used to guide the aircraft during takeoff and landing.
   飞行路线用于指导飞机起飞和降落。