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单词 sphere
释义 sphere
The figure generated when a circle is rotated about a diameter. The volume of a sphere is 4πr3/3 and its surface area is 4πr2, where r is its radius. In Cartesian coordinates the equation of a sphere centred at the origin is
x2 + y2 + z2 = r2
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更新时间:2025/6/23 0:40:34