托福og131页的那个听力。。有个句子真心烦人!!求牛人帮忙翻译一下 如下:the great lakes are like this, they were left over from the pleist——from the Pleistocene glaciers, the great lakes used to be a lot bigger as the glaciers were retreating ,some of the lakes were as much as a hundred feet higher in elevation.The beach of a former higher stage of Lake Erie was about fifty miles away from where the beach——the current beach of Lake Erie is right now.