The company extrapolates its figures from data from ISPs and from an opt-in panel of about 2.5 million users.
根据ISP的数据和一块包括了大约250万用户的选择面板，Experian Hit wise公司推测出了大概的访问量。
2
So do you remember here that the premise point to a sample of population and the conclusion extrapolates to the rest of the population.
你们记得这里前提，指的是一个人群样本，结论假设了其他人群。
3
He profiles soil samples from the past 200 years and extrapolates concentrations of heavy metals and foreign substances into a future without industrial inputs.