earth's s axis 地轴 ; 托福
earth's s axis
地球的s轴
以上为机器翻译结果，长、整句建议使用 人工翻译 。
However, the Earth's axis is unstable and wobbles like a gyroscope over a period of 26, 000 years.
BBC: Pyramids lined up with the stars
Because Earth's axis is tilted, all parts eventually get some darkness.
NPR: Space Probe to End Moon Mission with a Bang
We have the seasons we currently do, due to the Earth's tilt at an angle of 23 degrees on its axis.
BBC: Why the Moon is getting further away from Earth
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