  We argue that the general symmetry-breaking pattern in (quasi-)conventional
(parity and time-reversal symmetric single-band spin-singlet) superconductivity
is given by U(1)_V x U(1)_A -> U(1)_A, where V stands for vector and A stands
for axial-vector, as opposed to the breaking of U(1)_V\equiv U(1)_ele/mag by
itself as is commonly thought. This symmetry-breaking pattern implies that
there will be a Higgs mode which, together with the Goldstone boson that is
absorbed by the photon (Meissner effect), characterize the symmetry-breaking
dynamics. We obtain a number of strikingly simple analytical results, which
amalgamate the findings of the standard BCS and Ginzburg-Landau theories.
