请教此句理解！！！！

fengyeming

Anthropologists studying the Hopi people of the southwestern United States often characterize Hopi society between 1680 and1880 as surprisingly stable, considering that it was a period ofdiminution in population and pressure from contact with outside groups, factors that might be expected to cause significant changes in Hopi social arrangements.

请教这句话该怎么翻译呢，感觉GWD阅读翻译里的翻的不对，求确认下，谢谢哦！！！

cicijinlan

人类学家在学习h这种人的时候经常惊讶于发现这1680到1880这段时间的H社会是出奇的稳定，因为这段时间人口下降而且面临着来自外族交往的压力，这样的因素通常被认为会导致H社会的结构产生巨大的变动~