ellipse基本解释
n.椭圆;椭圆形
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基本词汇
n.椭圆;椭圆形
n.椭圆;椭圆形
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"the sums of the distances from the foci to any point on an ellipse is constant"
Comets were shown to move either in very elongated ellipses or in parabolas.
出自:A. Koestler