If a gyro is used to measure the rate of rotation around the aircraft roll axis, it will measure a non-zero value as long as the aircraft is rolling, but measure zero if the roll stops.

使用陀螺仪测量飞机机体轴向的旋转角速率时，如果飞机在旋转，测得的值为非零值，飞机不旋转时，测量的值为零。

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The twisting had previously been blamed for a 60-year cycle in day length, but the rate of rotation found in this study suggests it is not the culprit, says Jon Mound at the University of Leeds, UK.

这种震动以前被诟病为60年周期性日长变化的原因，但该研究发现的自转速度表明，它并不是罪魁祸首，英国利兹大学的乔恩芒德说。

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And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.

因此，我们可以用星星的自转速度及速率作为衡量它们年龄的计时器。

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Ajmal's action also involves an unusually high rate of abduction, or rotation around the elbow joint, which can create an illusion of the arm straightening.

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And the rotation rate determines the length of a day.

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RadioAstron will also examine pulsars and the outer regions of spiral galaxies in order to get more precise measurements on their rate of rotation and distance from earth.

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