劍橋詞典from or referring to the period of time between about 22 and 2.5 million years ago, in which many modern mammals and the earliest forms of humans appeared 新第三紀的（迄今2200至250萬年前間，許多現(xiàn)代哺乳動物和早先形態(tài)的人類在這一時期出現(xiàn)） the Neogene period 新第三紀時期 Neogene rocks 新第三紀巖石 the Neogene noun [ 單數(shù)名詞 ] the Neogene period 新第三紀時期 返回 Neogene