单词	第五公设问题
释义
随便看	principal plane of a cube principal point principal polarization principal polar subgroup of a lattice-ordered group principal realization of basic representation principal series principal strain principal stress principal symbol of partial differential operators principal symmetric plane of a cube principal tangent curve principal ultrafilter principal value interval of inverse trigonometric function principal value of arguments of complex numbers principal value of inverse trigonometric function principal value of the logarithmic function principal vector of force system principal vibration principal vibration principle congruence principle ideal of a lattice principle left projective semigroup principle of accumulation for the sequence of generalized analytic functions principle of addition or subtraction equilibrium force system principle of analytic continuation

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