当然，当他们打开，降落伞，空气阻力剧增，他们下降的更缓慢。
Of course, then they open the parachute and then the air drag increases enormously and then they slow down even further.
和其他探测器相同，好奇号的母舱依靠隔热板、空气阻力和放出降落伞的方式来减慢下降速度。
As with the other rovers, Curiosity's mother ship will rely on heat shields and air-resistance, and then on a parachute, to slow its arrival.
最主要的原因是他们在自由下降阶段或者降落伞打开后，撞到了山上。
Hitting the mountain while free-falling or after the parachute deploys is a common cause.
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