Pleistocene
adjective geology specialized uk/ˈplaɪ.stə.siːn/ us/ˈplaɪ.stoʊ.siːn/
更新世的，洪积世的（迄今约180万至1万年前的地质时间段，此时现代人开始出现，北半球经历冰河时代）
from or referring to the period of time between around 1.8 million and 11,000 years ago, in which modern humans first appeared, and the Northern Hemisphere experienced an ice age
the Pleistocene epoch 更新世时代
These are thought to be Pleistocene rocks. 人们认为这些是更新世岩石。
the Pleistocene
noun [ S ] ukus
更新世，洪积世
the Pleistocene epoch (= part of a period of time in the earth's history)