开垦河
开垦河-
经典影片《激流四勇士》的粉丝可能还记得出名的五弦琴决斗场面吧！《激流四勇士》讲述的是四个都市朋友乘着独木舟沿着未开垦的乔治亚河冒险，一路上状况不断。
Fans of classic movies will remember the famous dueling banjos scene in Deliverance , the story of four city friends who take an ill-fated boating trip down a backwoods Georgia river .
-
北宋时期黄土高原的土地开垦与黄河下游河患
Cultivation of Land in the Loess Plateau and Aggradation of the Lower Yellow River in the Northern Song Dynasty