4.Historical linguists posit a common ancestor from which both Romance and Germanic languages descend. Toassume is to accept something as existing or being true without proof or on inconclusive grounds:
历史语言学家认为罗斯语系和德语语系由同一种语言演变而来。 Assume 是指在没有证据或不确定
情况下认为某事是存在
或是真实
: