from 25 million to 13 million years ago; appearance of grazing mammals
miocene epoch 例句
英汉例句
analyses and researches systematically the facies and depositional environment of miocene epoch wudaoliang group in hoh xil basin in hinterland of the tibet plateau .
论文重点对青藏高原腹地中新世五道梁群和唢吶湖组的巖相和沉积环境进行了系统分析和研究。
it peaked in the oligocene epoch around 34 million years ago in eurasia, and again in the miocene epoch about 10 million years ago in eurasia and africa.