Photographers have been essential in that movement.
The Clintons have been essential to this pursuit.
Mirrors have been essential tools of self-portraiture since Parmigianino's time.
Arthur's foresight, loyalty, and generosity have been essential to the Gardens renaissance over two decades.
But the experience of adversity may well have been essential to his artistic achievement.
"The validators, I think, have been essential to issues of transparency and fairness," the mayor said.
Armed guards, now carried by more than 60% of vessels, have been essential in discouraging them.
Those bridges would have been essential for anyone seeking higher office at Harvard.
Therefore, it would have been essential to construct a hillfort in a prominent or strategic location.
Exogenous protein expression techniques, therefore, have been essential for research and medicine.
Metabolic engineering and synthetic biology have been essential for allowing new technologies to be developed.
