large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America 同义词：tyrannosaurus, Tyrannosaurus rex,
例句与用法
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These calculations lend further support to previous research indicating that the large tyrannosaurs could run no faster than 25 mph ( and certainly not the 45 mph seen in some movies ) , because its leg muscles weren ' t big enough for fast running 这些计算进一步支持了先前表明巨大的霸王龙奔跑速度不会超过25英里/小时的研究（而且是肯定不会在一些电影中看到的每小时45英里） 。
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