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ball
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Encyclopedia
理学
球体
释
ball
球体
一种重要的几何体。球面所围成的封闭几何体(或半圆绕其两端所决定的直径旋转而产生的几何体)称为球体,简称球。
Physics
ball
①球 ②滚珠,钢珠
Mathematics
ball
球
体
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canvas for covering
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