The motion of a heavy rigid body with a fixed point is described by the Euler-Poisson equations A p = (B-C)qr + P(z_0 γ_2-y_0γ_3), B q = (C-A)rp + P(x_0 γ_3-z_0γ_1), (1) C r = (A-B)pq + P(y_0 γ_1-x_0γ_2), γ_1 = γ_2r-γ_3q, γ_2 = γ_3p-γ_1r, γ_3 = γ_1q-γ_2p.
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机译：具有固定点的重刚体的运动由Euler-Poisson方程描述A p =（BC）qr + P（z_0γ_2-y_0γ_3），B q =（CA）rp + P（x_0γ_3-z_0γ_1） ，（1）C r =（AB）pq + P（y_0γ_1-x_0γ_2），γ_1=γ_2r-γ_3q，γ_2=γ_3p-γ_1r，γ_3=γ_1q-γ_2p。
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