soil defence

例句：

1. 1. To protect the environment, we need to implement soil defence measures.
   为了保护环境，我们需要实施土壤保护措施。
2. 2. The government has launched a campaign topromote soil defence and reduce pollution.
   政府已经发起了一场运动，以促进土壤保护并减少污染。
3. 3. Soil defence is crucialfor maintaining the fertility of ourfarmland.
   土壤保护对于保持我们农田的肥沃至关重要。