from or referring to the period of time between about 23 and 5.3 million years ago

Two trends are apparent during the Miocene Period. 中新世时期有两个明显的趋势。

He suggested Miocene deposits might reveal fossilized "missing links" of an aquatic or shoreline existence. 他认为中新世沉积物化石可能是证明某种水生或浅海生物存在的“缺失环节”。

the period of time between about 23 and 5.3 million years ago

The present glacial epoch began during the Miocene. 目前的冰河期始于中新世。

Later in the Miocene, the hominoid fossil record becomes sparse in Africa. 中新世晚期，非洲的古人类化石变得稀少。