rainfed farming

例句：

1. 1. Rainfed farming is a sustainable way of growing crops without relying on irrigation.
   无灌溉的农业是一种可持续种植作物的方法。
2. 2. The rainfed farming techniques have improved significantly in recent years.
   近年来，无灌溉的农业技术已经显著提高。
3. 3. Rainfed farming is an important part of the food chain, providing fresh produce for local communities.
   无灌溉农业是食物链中的重要部分，为当地社区提供了新鲜农产品。