Complex sentence: The consequence of the Pauli principle here is that electrons of the same spin are kept apart by a repulsive exchange interaction, which is a short-range effect complemented by the long-range electrostatic or coulombic force.
Split into simpler sentences: The consequence of the Pauli principle here is that electrons of the same spin are kept apart by a repulsive exchange interaction. This is a short-range effect which is complemented by the long-range electrostatic or coulombic force.