Definition
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球体
qiú tǐ
球体是指一个三维的几何形状,所有表面上的点到中心的距离相等。
A sphere is a three-dimensional geometric shape where all points on the surface are equidistant from the center.
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这个球体的表面非常光滑。
zhè ge qiú tǐ de biǎo miàn fēi cháng guāng huá.
The surface of this sphere is very smooth.
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在数学课上,我们学习了球体的体积计算。
zài shù xué kè shàng, wǒ men xué xí le qiú tǐ de tǐ jī jì suàn.
In math class, we learned how to calculate the volume of a sphere.
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科学家用球体模型来解释行星的运动。
kē xué jiā yòng qiú tǐ mó xíng lái jiě shì xíng xīng de yùn dòng.
Scientists use a sphere model to explain the movement of planets.