The drip irrigation system had to be small enough that a farmer only had to risk a quarter acre, even if he had two, because it was too frightening, given all that he had at stake.
新的滴灌系统 需要足够小使农民们 只需要用¼英亩的田地来冒险， 即使他有两英亩， 因为一次性将身家都赌上的风险太高了。