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Jump Back in Time 西部扩张与改革
Niagara Falls, General View from Hennepin Point, Winter.
1914年冬天尼加拉瀑布 的一景

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尼加拉 (Niagara) 源头的冰坝

就在1848329日的午夜过后不久,掉落尼加拉瀑布的东西只有令人感到可怕的宁静。在尼加拉瀑布的源头有一块巨大的冰阻塞住了水流,成为「冰坝」 (ice dam) 。不过,第二天晚上,河水冲破这块大冰块,水流在一次奔流而下,如雷声轰轰而落的瀑布再次出现。

Just after midnight on March 29, 1848, the only thing that was falling over Niagara Falls was an eerie silence. An enormous ice dam at the source of the Niagara River blocked the water. However, by the next evening, the river broke through the ice, and the water once again continued its thunderous tumble over the falls.
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