Complex sentence: However, in general relativity there is no way to define physical quantities corresponding to densities of "gravitational" field energy and field momentum; any "pseudo-tensor" purporting to define them can be made to vanish locally by a coordinate transformation.
Split into simpler sentences: However, in general relativity there is not a unique way to define densities of "gravitational" field energy and field momentum. Any "pseudo-tensor" purporting to define them can be made to vanish locally by a coordinate transformation.