Scientists say it formed when high sea levels flooded the middle of North America, splitting the continent in two for millions of years during the late Cretaceous period.

VOA: special.2010.10.05

In the Middle Ages and to some extent in the Early Modern period, we live in a theocentric world.

在中世纪甚至是现在早期，我们生活在以上帝为中心的世界里。

耶鲁公开课 - 文学理论导论课程节选

So the period of the exile is the sixth century, the bulk of the middle of the sixth century.

那么六世纪的流放期，六世纪中页的大部分时期。

耶鲁公开课 - 旧约导论课程节选