Radar tracking of the shuttle, like the final accurate ground-based navigation, had not yet begun.
对航天飞机的雷达追踪，如最后精确的陆基导航，还没有开始。
Holding on the ground is a kind of widespread method based on traffic flux management.
基于交通流量管理的地面等待是空中交通管制中普遍应用的一种方法。
Holding on the ground is a kind of widespread method based on traffic flux management.
基于交通流量管理的地面等待是空中交通管制中普遍应用的一种方法。
应用推荐