Ontario, and Erie. Here is not large, perhaps it is beautiful.
2.escarpment悬崖
3.Cliffs are generally steep and high cliff in the mountains, and they are very dangerous, there will be a lot of people to climb them.


6.glaciation冰川
7.Glacier is a huge flow of solids, in the alpine region recrystallization from accumulated snow into a huge glacier ice, due to gravity so that the main factors that glacial ice flows, as a glacier.



general, there are deep valleys and beautiful scenery.
13.Lake Superior,Lake Huron,Lake Erie,Lake Ontario,Lake Michigan.
14.I rearn Lake Superior,Lake Huron,Lake Erie,Lake Ontario,Lake Michigan.and River valleys ,and glaciation.
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