圆球变扁后，极轴方向的半径小于赤道方向的半径，此时的形状即为扁球。
右图中的球是围绕碳原子的电子云的图像。 它们分别是径向对称的球和中间有节点的双扁球形状，就像s和p原子轨道给出的电子密度图。
There’s a radially symmetric blob, and a double-lobed blob with a node in the middle – just like the patterns of electron density that the s and p atomic orbitals give rise to.
建立了正弦波纹扁球壳的非线性强迫振动微分方程；
The differential equations of nonlinear vibration of the shell were obtained.
本文利用边界元方法分析了变厚度扁球壳的非线性问题。
In this paper, we analyse the shallow spherical shells with variable thickness by the boundary element method.
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