Pliosaurs are thought to have been ambush predators, using their giant flippers to launch ferocious attacks.
上龙被认为是一种埋伏型猎食者，使用它们巨大的鳍状肢发动凶猛的进攻。
Pliosaurs were the top Marine predators during a time when the oceans were teeming with large, meat-eating reptiles.
在海洋中充满庞大的食肉动物的那个时期，上龙是它们的霸主。
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