And the family seems to have diversified a lot in the middle Neogene Period, around 14 million years ago, which is also when we start seeing a lot of its fossils.
在大约 1400 万年前的新近纪中期，这个家族似乎已经多样化了很多，这也是我们开始看到它的大量化石的时候。
Neogene Period
原声例句
PBS地球-动物趣闻
中文百科
新近纪 Neogene
（重定向自Neogene Period）
新近纪（英语：Neogene，符号N），旧称晚第三纪，是地质年代中一个纪，开始于同位素年龄23.03±0.05百万年，持续了21.4百万年。
英语百科
Neogene 新近纪
（重定向自Neogene Period）
The Neogene (pronunciation: /ˈniːəˌdʒiːn/) is a geologic period and system in the International Commission on Stratigraphy (ICS) Geologic Timescale starting 23.03 million years ago and ending 2.58 million years ago. The second period in the Cenozoic Era, it follows the Paleogene Period and is succeeded by the Quaternary Period. The Neogene is sub-divided into two epochs, the earlier Miocene and the later Pliocene.
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