runway distance marker

例句：

1. 1. The pilot marked the runway with a flag before taking off.
   飞行员在起飞前用一面旗子标记了跑道。
2. 2.The flight crew marked the runway for takeoff and landing.
   飞行机组人员为起飞和降落标记了跑道。
3. 3. The aircraft was equipped with a runway distance marker to ensure safe separation from other aircraft.
   该飞机装备有跑道距离标记，以确保与其他飞机安全分离。