Triassic Period

例句：

1. 1. The TriassicPeriod is a time in Earth'shistory when dinosaurs roamed the earth.
   三叠纪时期是地球历史上恐龙在地球上漫游的时代。
2. 2. Thediscovery of fossils from the Triassic Period has helped scientists understand theevolution of life on Earth.
   从三叠纪时期的化石发现有助于科学家理解地球上生命的演化。
3. 3. The Triassic Periodwas characterized by the rise of new speciesand the extinction of many existing ones.
   三叠纪时期以新物种的兴起和许多现存物种的灭绝为特征。