earth's polar radius
... curvature radius曲率半径;转弯半径;弯曲半径 radius rod半径杆;径向杆 polar radius极半径;地球极半径 ...
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换句话说,如果按照这个比例制作一个半径30厘米的地球仪,那么它的赤道半径和极半径仅相差1毫米!
In other words, if according to the proportion of production with a radius of 30 cm of the globe, so its equatorial radius and the polar radius is only a difference of 1 mm!
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