他在一分钟以内就下降了672米(2205尺)，在跳下十秒钟后，他打开了降落伞，不再作自由落体运动。
He descended 672 metres (2, 205 feet) in less than a minute, his fall broken by a parachute which opened ten seconds into the jump.
当降落伞在空气中作非定常运动时，空气动量的变化率必须包括在降落伞的运动方程中。
As a parachute canopy moves unsteadily through the air, its equations of motion must include the rate of change of momentum of the air in which it is immersed.
该伞是EN-C高型能的滑翔伞，具有非常精准且富于变化的超作性能。
The FACTOR 2 is an EN-C High Performance glider, which offers a very precise and dynamic hand ling behavior.
该伞是EN-C高型能的滑翔伞，具有非常精准且富于变化的超作性能。
The FACTOR 2 is an EN-C High Performance glider, which offers a very precise and dynamic hand ling behavior.
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