bad earth

例句：

1. 1. The farmers have been struggling to grow crops on this bad earth for years.
   农民们多年来一直在这片贫瘠的土地上挣扎着种植作物。
2. 2. The government has been investing heavily in improving the quality of the bad earth.
   政府一直在大力投资改善这块贫瘠土地的质量。
3. 3. The scientists are trying to find ways to turn this bad earth into fertile soil.
   科学家们正在尝试找到方法将这块贫瘠的土地转化为肥沃的土壤。