地面处理要求 surfacing requirements
要求地面 call for the ground
客运地面缆车安全要求 Safety requirements for passengers funiculars
直升机地面试验要求 Helicopter ground test requirement
这项运动的规则要求竞走运动员的膝盖在大部分的腿部摆动过程中保持笔直，一只脚始终与地面保持接触。
The sport's rules require that a race walker's knees stay straight through most of the leg swing and one foot remain in contact with the ground at all times.
指向的意思是要求卫星(或卫星上的设备)朝向一些地面目标。
Pointing refers to the requirement to point the satellite (or an instrument on the satellite) toward some ground object.
按照五角大楼的要求，夜间任务包括广泛的地面作战、起飞和着陆，以及黑暗笼罩下的目标的视觉辨认。
According to the Pentagon, night missions include extensive ground operations, takeoffs and landings, and the visual identification of targets, all of which occur in the cover of darkness.
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