We can't be growing 200,000 acres of cotton in Arizona with flood irrigation.

我们不能在亚利桑那州用洪水灌溉种植 200,000 英亩的棉花。

Even if a farmer upgrades from flood irrigation to drip or sprinkler irrigation, any of the savings created from that upgrade are just passed along downstream to the next user.

即使农民从漫灌升级为滴灌或喷灌，升级所产生的任何节约也只会传递给下游的下一个用户。