translation.en: Irrigation starts to make you be allowed to plant stuff where you want it, as opposed to where the rivers flood. You start getting this organic agriculture; you start putting machinery onto this stuff. Machinery, with a whole bunch of water, leads to very large-scale agriculture.
translation.zh: 灌溉使你能够随心所欲地种植农作物， 而不是只能种在 河水能够流到的地方。你可以开展这种有机农业， 你开始使用机械设备进行生产。 机械化，结合大量的水， 使大规模的农业生产成为可能。