  Describing the gravitational energy and momentum, the Bel-Robinson tensor is
the best tensor. However, the classical pseudotensors can also manage the the
same job. As Deser mentioned in 1999, a certain linear combination between
Einstein pseudotensor and Landau-Lifshitz pseudoetnsor give a pure Bel-Robinson
tensor. Here we used the same idea but adapted the harmonic gauge, we found
that all the classical pseudotensor alone cannot give a multiple of the
Bel-Robinson tensor. But under a modification, all of them contribute the same
energy-momentum and stress as the Bel-Robinson tensor does.
