论文部分内容阅读
Foods can be terribly destructive.They often wash away fertile top-soil and may leave the land unfit for cultivation for years to follow.Theyare dread destroyers of property,sometimes washing away entire townsand taking a horrible toll of human lives.However,some floods have good results instead of bad.Such an over-flowing of water is the annual flooding of the Nile River in Egypt.Each spring,as regular as clockwork,the heavy rains of central Africa
Foods can be terribly destructive.They often wash away fertile top-soil and may leave the land unfit for cultivation for years to follow.Theyare dread destroyers of property,sometimes washing away entire townsand taking a horrible toll of human lives.However,some floods Have good results instead of bad.Such an over-flowing of water is the annual flooding of the Nile River in Egypt.Each spring,as regular as clockwork,the heavy rains of central Africa