  A new three parameter formula is proposed for ground-state bands in even-even
soft rotors or called transitional nuclei. The new formula blends those of very
soft nuclei and well deformed nuclei. Especially, it is found in fact that the
formula proposed by P. von Brentano et al. can be derived from our formula if
some approximations are adopted and it can be explained why in their work the
energy-dependent term beta*E can be dropped. Compared to their formula it can
be resulted in that the range of validity of our formula will be much broader
than theirs.
