Bison waste no longer fell on the ground to improve the soil, which as a result became less good for growing plants.
地上不再有野牛的粪便来改良土壤,结果对于植物生长土壤变得不够肥沃了。
Most of us are able to solve most of our problems. Often, all we need is a good friend who will listen to us while we talk things through. If friends can take turns to listen to each other well, life will be better!