People say it wobbles and falls over in the beginning.
人们说它在一开始的时候摆动、翻倒。
It speeds up and it slows down and it wobbles as it rotates.
它时而加速时而减缓，并且当它转动时总是在摇摆。
A mother describes her child's hastily made table as "Perfect"! Even thought it wobbles on uneven legs.
一位母亲用“完美无缺”来形容她孩子匆忙做成的桌子，尽管桌子的腿长短不一，摇摇晃晃。
Richard Gross: the Earth's rotation changes all the time. It speeds up and it slows down and it wobbles as it rotates.
理查德·格罗斯：地球的自转是时刻改变的，时而加速，时而减速，在旋转的时候还会摆动。
Richard Gross: the Earth's rotation changes all the time. It speeds up and it slows down and it wobbles as it rotates.
理查德·格罗斯：地球的自转是时刻改变的，时而加速，时而减速，在旋转的时候还会摆动。
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