eocene epoch

基本解释

Few or any anthropoids are known to have existed in Africa during this period, known as the Eocene epoch.
人們原先不知道在這個被稱爲“始新世”的時期，非洲有類人猿的存在。
The microorganisms had lain dormant since the Eocene epoch, a time when Australia split off from Antarctica and modern mammals first appeared.
自始新世（5300-3650萬年前）開始，它們便沉睡在化石之中，在那個時代，澳洲板塊剛剛與南極板塊分離，而現代哺乳動物剛剛開始出現。
It indicated that during the midterm Eocene epoch or before the wild buffalo, david deer and Chinese alligator originated from the middle lower reaches of Yellow River.
本文利用考古、文獻以及實地調查等資料，論述了全新世中期及其以前，野生水牛、四不像鹿和中國鼉都以黃河中下遊地區爲起源和棲息地。

Though the Cretaceous asteroid cleared the stage, mammals did not really get going until 10m years later, in the Eocene epoch.
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