Lester knows intimately the challenges of repeating as champions.
Mr. Romney dismissed the idea of repeating his challenge to Senator Edward M. Kennedy, so the most likely post appeared to be governor.
Particularly in the case of biotic factors, long-lived species face the challenge of surviving repeated attacks from antagonists with short generation times which are therefore capable of more rapid evolutionary change.
Cardiff Blues will be dreaming of repeating their European Challenge Cup triumph of 2010 after holding out for another French scalp at Lyons.
His limited range is truly challenged trying to find different ways of repeating his one line: "I am Groot".
The description of macromolecules such as polyethylene which consist of repeating units is also challenging.
However, our findings challenge the sensitivity of repeated BIVA hydration measurements as a dynamic indicator of changes in body water content.
"What's the point of repeating what has already been done?" he replied when challenged.
Official position of the American Academy of Clinical Neuropsychology on serial neuropsychological assessments: the utility and challenges of repeat test administrations in clinical and forensic contexts.
