Noun:

1. waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls

2. a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York

Niagara Fallsn.尼亚加拉大瀑布

Niagara River尼加拉河

1. I hope to see Niagara Falls some day.
   我希望有一天能去看看尼亚加拉河瀑布。
2. Niagara Falls is a huge waterfall that lies on the Niagara River.
   尼亚加拉大瀑布是尼亚加拉河上的一条大瀑布。