英语翻译

题目

英语翻译
Contrary to witness descriptions of the muhuru（一种恐龙）,Stegosaurus was not heavily armored,and had a thagomizer（恐龙尾部的“骨针”,或称“骨刺”） at the end of its tail,rather than a bony club.However both are features found in ankylosaurs,another group of armored dinosaurs.Another postulate is that in the 65 million years since the youngest Stegosaurus fossils were found,this subspecies might have developed new features,like a club tail or lighter armour.Birds are the only group of dinosaurs believed by mainstream scientists to be extant.
Stegosaurus ：剑龙
ankylosaurs：甲龙
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