冲蚀

例句：

1. 1. The riverhas been eroding the banks forcenturies.
   这条河已经侵蚀河岸几百年了。
2. 2.The rocks are being worn away by theconstant flow of water.
   这些岩石正被不断流动的水磨损。
3. 3. The sand is washingaway the beach, leaving only the hardiest of shells behind.
   沙子正在冲刷海滩，只留下最坚硬的贝壳。