The Tertiary period
01
第三紀, 第三期
a division of earth's geological time that began about 66 million years ago and lasted until about 2.6 million years ago
例
The Tertiary Period saw the diversification of mammals after the extinction of the dinosaurs.
第三紀は、恐竜の絶滅後に哺乳類の多様化を見た。
During the Tertiary Period, Earth's climate gradually cooled, leading to the formation of ice sheets.
第三紀の間、地球の気候は徐々に冷え、氷床の形成につながりました。
