The sediment discharge of rivers with cultivated waste land of dryfarm, population density are indirect proportion, it with forest cover degree, per capita output of grain are inverse proportion.
河流输少量与旱坡耕地垦殖率、人口密度成正比，与森林覆盖率、人均占有粮食成反比。
2
His small plot is dry, and he has to walk several kilometres to get water from a neighbouring farm.