如果陀螺仪发生故障，天体导航系统就会接替它继续进行工作。
Should the gyroscopes break down, the celestial system would take over.
为了实现安全着陆小天体，探测器必须具有自主导航、制导和控制的能力。
Probe must have the ability of autonomous GNC to perform landing safely.
为了实现安全着陆小天体，探测器必须具有自主导航、制导和控制的能力。
Probe must have the ability of autonomous GNC to perform landing safely.
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