extrapolate
verb [ I or T ] uk/ɪkˈstræp.ə.leɪt/ us/ɪkˈstræp.ə.leɪt/
推断;推知
to guess or think about what might happen using information that is already known
You can't really extrapolate a trend from such a small sample. 你不能仅凭这样一件小小的样品就推断出潮流真正的发展趋势。