The Picard variety Pic 0 (T n ) of a complex n-dimensional torus T n is the group of all holomorphic equivalence classes of topologically trivial holomorphic (principal) line bundles on T n . The total space of a topologically trivial holomorphic (principal) line bundle on a compact Kähler manifold is weakly pseudoconvex. Thus we can regard Pic 0 (T n ) as a family of weakly pseudoconvex Kähler manifolds. We consider a problem whether the Kodaira's ∂∂-Lemma holds on a total space of holomorphic line bundle belonging to Pic 0 (T n ). We get a criterion for this problem using a dynamical system of translations on Pic 0 (T n ). We also discuss the problem whether the ∂∂-Lemma holds on strongly pseudoconvex Kähler manifolds or not. Using the result of Colţoiu, we find a 1-convex complete Kähler manifold on which the ∂∂-Lemma does not hold.