A group of paleontologists recently announced that a site in Utah has yielded fossils of some of the biggest armored dinosaurs ever found, and that they were at least 25 million years older than any similar dinosaur type previously found in North America.
and that they were at least 25 million years older than any similar dinosaur type previously
and they are at least 25 million years older than those of any similar dinosaur type that previously was
and the fossils are at least 25 million years older than any similar dinosaur types that previously were
fossils that are at least 25 million years older than those of any similar dinosaur type previously
fossils at least 25 million years older than similar dinosaur types previously
应该是不同恐龙的fossils对比,C中fossils和恐龙对比了
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