单词	parallel distance in Lobachevskian geometry
释义
随便看	variational method in quantum mechanics variational method in the theory of nonlinear integral equations variational principle variational principle variational principles of elasticity variational problem variational problem variational problem of the conditional extremum variation integral variation of constants variation of constants formula variation of function variation on path space variation primitive function variation vector field varied-curve surface variety variety (in universal algebra) variety of axiom of determinacy variety of groups variety of lattice-ordered groups variety of rational language variety of stationary curve Varignon parallelogram) Varignon theorem

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