求助一道英语翻译题
请各路大侠帮忙翻译下面两段话,谢谢!
1、A dam is a wall constructed across a valley to enclose an area in which water is stored.This area is called a reservoir and may be used rof supplying water to towns or factories,for irrigating land,or for generating power.Dams which are built in headwaters of rivers serve to control the follow of water to the lower valleys during flood seasons.
2、Tombs and temples of ancient Egypt follow the Nile well into Sudan.Driving southward from Cairo into the Valley,Ientered a landscape that owed little to the present era.For the next 1,800 miles the thin blue ribbon of the Nile,flowing slowly north,unwound over brown soil and green fields,some only a few yards wide,other as broad as an Iowa cornfield.At the edge of the fields,rising in dramatic hills or stretching flat to the horizon,lay the brown barren deserts.