To prove the theorem we shall suppose that the graph G is drawn on a sphere as described above.
为了证明这个定理，我们假定这个圆G能按上述方式画在一个球面上。
After the scattering boundary conditions were set up, the scattering pressure expression of the solid sphere in the focusing area was derived by column function addition theorem.
建立了散射边界条件，并运用柱函数的加法定理，通过理论推导得到了聚焦区内刚性球形微粒的散射声压表达式。
Using the Gauss-Bonnet theorem, Stephen Hawking proved that the topology of the event horizon of a (four dimensional) black hole is a 2-sphere.
使用高斯-博内定理， 史蒂芬·霍金证明一个（四维）黑洞活动视界的拓扑结构是2个球体。
Using the Gauss-Bonnet theorem, Stephen Hawking proved that the topology of the event horizon of a (four dimensional) black hole is a 2-sphere.
使用高斯-博内定理， 史蒂芬·霍金证明一个（四维）黑洞活动视界的拓扑结构是2个球体。
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