It's unclear at present what T. rex's exact sprinting speed was, but Persons believes this fleetfooted dinosaur could run down all other animals in its ecosystem.
SHIFTING consumer tastes and changing regulations have forced even the clumsiest of retail behemoths to be more fleet-footed.
随着顾客口味的改变以及业内规则变化，即便最糟糕的零售巨兽也飞速发展起来。
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The teeth of these fleet-footed predators are too small to use as daggers for large kill, but the cats have strong jaws that lock around the throat of prey until the victim stops breathing.