Every year, millions of salmon swim from the ocean into the mouthsofrivers and then steadily up the rivers.
每年，数百万条鲑鱼从海洋游到河口，然后稳定地逆流而上。
2
Besides, you will not find coral near the mouthsofrivers either Because the river water has too much soil in it or Because it is polluted.
此外，在江河的入海口附近也不会有珊瑚，因为江水要么含有太多的泥土，要么就是被污染了。
3
This involves tapping both freshwater and seawater at the mouthsof Norway’s many rivers and fjords, and diverting it to tanks on either side of a semi-permeable membrane.