1·Often the cheapest way to provide irrigation water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions and pumping it to nearby cropland.
在干旱的热带地区，提供灌溉水的最低成本的方法通常是建造小规模的工程。例如，在洼地收集雨水，然后将其抽调至附近的农田。
2·The land is big and mostly flat with many fields of corn, wheat and soybeans. But as we travel west, the cropland gives way to wild grasses.
这片土地很广阔，也很平坦，其主要农作物是玉米、小麦和大豆，但我们再往西，从农田的小道，我们来到了一片野草地。
3·Fly ash uranium sometimes leaches into the soil and water surrounding a coal plant, affecting cropland and, in turn, food.
浮尘中含有的铀有时会溶入煤电厂周围的土壤和水体中，影响农田，进而影响食物。
4·In Mali, the practice of growing trees amid rows of cropland seemed to be everywhere.
在马里成片的农田中，植树的实践方法已经随处可见。
5·They suggest that if the subsidies were to end, new forest could be converted back into cropland and natural forest logged again.
他们认为，如果那些津贴不到位，新的森林就会又变为农田，砍伐天然林又会出现。