单词	contact manifold
释义
随便看	irredundant subset of Boolean algebras irreflective binary relation irregular cone irregular galaxy irregularity irregular point irregular singularity irrotational field irrotational flow irrotational flow of incompressible fluid ISDN交换 I-semigroup isoclinal secant line isocline of a trihedral angle isogeny isogonal conjugate points isogonal line isohedral polyhedron isohedral semiregular polyhedron isohedral tetrahedron isolated graph isolated Jordan arc isolated module isolated order isolated point

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