Our species originated around 200,000 years ago and underwent tremendous diversification culturally, technologically, linguistically, artistically for 130,000 years.
2019年6月六级真题(第一套)听力 Section C
柯林斯高阶英汉双解学习词典释义
VERB
增加…的品种;从事多种经营;(使)多样化
When an organization or person diversifies into other things, or diversifies their range of something, they increase the variety of things that they do or make.