Of course, then they open the parachute and then the air drag increases enormously and then they slow down even further.
当然，当他们打开，降落伞，空气阻力剧增，他们下降的更缓慢。
The draw-out-time is one of the most important ballistic parameters of the low-drag parachute bomb.
减速伞拉直时间是描述低空低阻伞弹道特重要要参量。
The desire to increase landing safety margins for the Space Shuttle Orbiter led to decision to implement a Drag Parachute System into the Orbiter Vehicle.
航天飞机轨道器设置阻力伞的目的在于增加其着陆的安全性。
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