A river is usually fresh water and it flows toward an ocean or a lake. 河流通常是指淡水河，它流向海洋或湖泊。

　　The Nile River is the longest river in the world, and it is about 4170 miles long. 尼罗河是世界上最长的河流，它大约有4170英里（约6711千米）长。

　　Also, it flows through nine different countries. 而且，它流经9个不同的国家。

　　The Nile River helped the people of Egypt in ancient times and even today. 尼罗河哺育了古代、甚至是现代的埃及人民。

　　95 percent of Egypt's population lives on the bank of the Nile River. 95%的埃及人口生活在尼罗河畔。