棘龙的牙齿和霸王龙的牙齿完全不同。
Spinosaurus teeth and tyrannosaurus teeth were completely different.
对于棘龙来说，饮食只是进化的冰山一角。
As for spinosaurus, diet was just the tip of the evolutionary iceberg.
57英尺长，9吨重，棘龙在大约1亿年前的白垩纪早期就开始四处活动。
Fifty-seven feet long and up to nine tons, spinosaurus started poking his head around the early Cretaceous some 100 million years ago.
他们究竟填补了哪些进化中的生态位有待讨论，主要是因为在过去50年里没有人见过棘龙的骨骼。
Just what evolutionary niche they filled is up for debate, largely because no one has seen a spinosaurus skeleton for the last 50 years.
这一化石骨骼和头骨被昵称为“WetWilli”（潮湿威利），它们属于一种长棘龙（Dimetrodongiganhomogenes）。
Nicknamed "Wet Willi," the skull and fossils belong to Dimetrodon giganhomogenes.
但人们为它们到底填补了哪些进化中的空白仍争论不已——主要是因为人们已有50年未见过一只棘龙的骨骼化石。而已有的骨骼化石早已遗失在二战期间的废墟中了。
Just what evolutionary niche they filled is up for debate - largely because no one has seen a Spinosaurus skeleton for the last 50 years, when it got lost amid the ruins of World War II.
双棘龙是个巨大的恐龙，它约有90英尺长，其中，脖子长26英尺，尾巴45英尺。
Diplodocus was a giant dinosaur. It was about 90 feet long. Its neck was 26 feet long and its tail was 45 feet long.
另外，棘龙的牙齿与霸王龙的牙齿有着本质的不同。
Additionally, Spinosaurus teeth and Tyrannosaurus teeth were completely different.
这些特征指示凹棘龙与新铺龙可能具有较近的亲缘关系。
This indicates that the new taxon may have a closely relationship with Xinpusaurus.
棘背龙是肉食动物。
棘背龙是肉食动物。
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