“precession”的意思

单词 precession
释义 precession n[U] (also pre,cessionof the `equinoxes) gradual change in the angle at which the earth revolves daily, causing the equinoxes to occur slightly earlier in each successive year 岁差(地球自转角度的渐次变化, 使每年的春分点及秋分点比上年略为提前).

 

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