If the defective system can be determined, couple the functioning altimeter system to the altitude-keeping device.

如果可以断定故障系统，将工作正常的高度表系统与高度保持装置耦合。

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Keeping device in sync is driving up crazy, he says.

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Keeping the device in stock has already been a problem for Google.

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Using Eyes Free mode, Siri takes hands-free functionality even further and minimizes distractions even more by keeping your iOS device's screen from lighting up.

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