Twice a year, when heavy rain filled its sources, the river would swell and burst its banks, flooding the whole land.

一年两次，每逢尼罗河源头下大雨，河流就会涨满，然后漫过河岸，淹没整个埃及的土地。

And roughly 8,000 years ago rising sea levels flooded this low elevated land and submerged it which separated the higher hills of Britain from the European mainland.

大约在 8000 年前，不断上升的海平面淹没了这片地势较低的土地，它将英国较高的丘陵与欧洲大陆隔开。