runway threshold markings

例句：

1. 1. The pilothad to make a quick decision about the best way to land the plane on the runway.
   飞行员必须迅速决定最佳的降落方式，将飞机安全地降落在跑道上。
2. 2. The airport authorities were working hard to ensure that all aircraft landed safely at their respective runways.
   机场当局正在努力确保所有飞机都能安全地降落在其各自的跑道上。
3. 3. The pilot carefully checked the runway threshold markings before taking off to avoid any potential accidents.
   飞行员在起飞前仔细检查了跑道入口标记，以避免任何潜在的事故。