Describes how armor helped dinosaurs such as Albertosaurus and Edmontonia to survive attack, as well as how scientists have learned about armored dinosaurs through studying fossils.
空中恐龍
Digging For Bird-D ...
海中恐龍
食草恐龍
恐龍大挖掘
恐龍的世界
奇幻的恐龍世界
侏羅紀大冒險
Apatosaurus and ot ...
恐龍
Let's Look At Dino ...
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