What we see today is the product of evolutionary events resulting from the dispersal of a few human populations out of Africa around 60, 000 to 70, 000 years ago.
2019年6月六級真題（第一套）聽力 Section C
柯林斯高階英漢雙解學習詞典釋義
N-UNCOUNT
散開;散布;傳播
Dispersal is the spreading of things over a wide area.