Every three years, continuing education is required to maintain the designation.
No matter what the definition, results after three years continue to be statistically significant whether we look at all students or just those with benchmark test scores.
The long-term damage to public trust in the BBC caused by its decision to pay Jonathan Ross £18m over three years continues to accumulate.
The bombings that have plagued the city and the surrounding area for about three years continue, and a spate of such attacks late last year had the city on edge in the weeks leading up to its big millennium celebration.
A second relegation in three years continues a dismal fall from grace for Stockport, who competed in the former First Division [now the Championship] little more than a decade ago.
If the next three years continue to be filled with news of NSA spying on ordinary Americans, interventions gone awry in the Middle East and the continued weakening of American influence, however, the story may not end well for Clinton.
The longest heatwave in seven years continued to stretch the country in all sorts of directions today.
He became an American citizen in 1955, and for the next twenty years continued as an executive in the steel business, eventually becoming the owner of Global Steel.
Fulham, seeking a fourth successive league and cup win for the first time in four years, continued to provide Blackburn's confidence-drained defence with some awkward moments.
After a decade of freelancing, he became assistant editor of the Times Literary Supplement (1960-67), and for a further eight years continued to make an enormous contribution to its arts and foreign literature coverage.
However, many of the journals founded in the preceding twenty years continued publication, so there was actually a net increase in fora for philosophical work.
