如果没有新的电池和陀螺仪，哈勃将失去动力并且无法指向正确的方向。

Without new batteries and new gyroscopes it would lose both the power and the ability to point in the right direction.

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iPhone 4的陀螺仪则支持更多动作感知功能，比如跟踪方向、速度和旋转等。

And in the iPhone 4, a new gyroscope allows for additional motion-sensing capabilities, too, like the ability to track orientation, velocity and rotation.

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对于偏航角度，由于偏航角和重力方向正交，无法用加速度计测量得到，因此还需要采用其他设备来校准测量偏航角度的陀螺仪的漂移值。

For yaw, which is orthogonal to gravity, the accelerometers can't help you, so you need something else to correct your drifting yaw gyro.

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