Between 30 and 40 fossil specimens have been identified, all collected from the Tiaojishan Formation, which dates to the middle Jurassic period, 160.89–160.25 Ma ago.
Between 30 and 40 fossil specimens have been found, all collected from the Tiaojishan Formation, which dates to the Middle Jurassic, 160 million years ago (mya).
Between 30 and 40 fossil specimens have been found, all collected from the Tiaojishan Formation, which dates to the Middle Jurassic, 160 million years ago (mya).
用更简单的方式重写这句话: Between 30 and 40 fossil specimens have been identified, all collected from the Tiaojishan Formation, which dates to the middle Jurassic period, 160.89–160.25 Ma ago. 输出: