Although the long - term prognosis of pets with congestive heart failure is guarded, pets that can be initially stabilized may lead comfortable lives for variable periods of time through the use of combination medical therapy. (1800petmeds.com)
Oceanic oscillations are sufficient to cancel out or enhance the effects of natural variations in solar irradiance or other forms of solar input to the heat budget of the Earth for variable periods of time. (newclimatemodel.com)
The great resonant systems of the Pacific respond at variable periods — the tempo increased last century for instance — of La Niña and El Niño alternation. (watertechbyrie.com)