Krech also contradicts Martin's exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene.
Krech 断言广泛的气候变化确实发生在更新世末期，这与 Martin 排除气候变化作为解释的观点相矛盾。
2
This vision of the founders served as a basis for asserting that freedom was a national moral imperative, and that the United States Constitution was an antislavery document.
国父们的这种远见成为了主张自由是国家道德义务的基础，美国宪法是一份反奴隶制的文件。
3
The republics began asserting their right to govern themselves.