例句與造句

1. An example of this would be the episode in which Gates has his friends at his local barbershop take a DNA test to determine their ethnic makeup, each friend betting on their percentages of Native American genetic heritage.
2. The uncertainty is fed by a lack of archaeological evidence along migration routes that date to the periods when those migrations are proposed to have occurred; uncertainties in the dating and interpretation of the oldest proposed archaeosites in the Americas; and uncertainties of assumptions underlying chronological and source models of migration derived from studies of modern Native American genetics.
3. It's difficult to find native american genetics in a sentence. 用native american genetics造句挺難的