Precession, basically is the change in the direction of earth's axis of rotation.

岁差，基本上是地球自转轴方向的改变。

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After change of management at BLRI and rotation of national project staff, additional training was provided for new colleagues.

在孟加拉畜牧研究的管理发生改变以及国家项目职员轮换时，还对新来的同事提供进一步的培训。

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Gears serve to transfer power and change the direction of rotation.

传动装置的作用是传送动力和改变旋转方向。

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One idea is that "star quakes" on the surfaces of pulsars affect the change in rotation speed, or that the glitch is caused by interactions between the stars' fluid interiors and crusts.

MSN: Oddball pulsating star hiccups as it spins

"If the sudden frequency change is neglected, then after only eight hours, a complete rotation of the pulsar is lost in our counting, and we can no longer determine at which rotational phase the gamma-ray photons reach the detector aboard Fermi, " Pletsch explained.

MSN: Oddball pulsating star hiccups as it spins

By the time any change occurred, humans might even have generated technology that could speed up the Earth's rotation or transport us to other liveable planets within our galaxy.

BBC: Why the Moon is getting further away from Earth