常見(jiàn)例句雙語(yǔ)例句Few or any anthropoids are known to have existed in Africa during this period, known as the Eocene epoch.人們?cè)炔恢涝谶@個(gè)被稱為“始新世”的時(shí)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(wàn)年前）開始，它們便沉睡在化石之中，在那個(gè)時(shí)代，澳洲板塊剛剛與南極板塊分離，而現(xiàn)代哺乳動(dòng)物剛剛開始出現(xiàn)。Dating from the Eocene Epoch, the crater is likely less than 50 million years old, but the impact bored into Proterozoic sandstones well over 500 million years old.它形成于始新世，距今可能不到5000萬(wàn)年，但是撞擊鉆入的原生代砂巖都已經(jīng)超過(guò)5億年。權(quán)威例句Though the Cretaceous asteroid cleared the stage, mammals did not really get going until 10m years later, in the Eocene epoch.ECONOMIST: A geological burp may have led to the dinosaurs’ domination 返回 the Eocene epoch