The Tertiary period
01
第三纪, 第三时期
a division of earth's geological time that began about 66 million years ago and lasted until about 2.6 million years ago
例子
The Tertiary Period saw the diversification of mammals after the extinction of the dinosaurs.
第三纪见证了恐龙灭绝后哺乳动物的多样化。
During the Tertiary Period, Earth's climate gradually cooled, leading to the formation of ice sheets.
在第三纪期间，地球的气候逐渐变冷，导致冰盖的形成。
