例文
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- They know he hunted in packs because of fossil footprints.
- Occasionally fossil footprints dating back to this age are found.
- Fossil footprints are the most common kind of early dinosaur fossil in the eastern United States.
- The oldest known evidence of tetrapods comes from 395-million-year old fossil footprints found in ZacheBmie.
- No other place in the world has fossil footprints of all these different dinosaurs found in a single area.