土壤保持

例句：

1. 1. To conserve the environment, we must reduce our use of plastics.
   为了保护环境，我们必须减少使用塑料。
2. 2.The farmers are implementing soil conservation practices to improve their crop yields.
   农民们正在实施土壤保持实践，以提高他们的作物产量。
3. 3.The government has introduced new regulations to protect the fragile ecosystems in the region.
   政府已经引入了新的法规来保护该地区脆弱的生态系统。