  In this paper, we first give a characterization of silting objects in the
comma category Assume that C1 and C2 are two subcategories of left R-modules,
D1 and D2 be two subcategories of left S-modules. We mainly prove that (C1, C2)
and (D1, D2) are torsion pairs if and only if the induced two pairs in the
special comma category are torsion pairs under certain conditions.
