Fifty years ago, American chicken farmers found that by keeping their birds in sheds they could produce chickens for the table more cheaply and with less work than by traditional farmyard methods. The new method spread: chickens disappeared from fields into long, windowless sheds.
50年前，美国的鸡农发现大棚养鸡不仅可以提供价廉物美的餐桌肉食，还能比传统庭院养鸡的方式省不少力气。新的方法被快速推广：肉鸡从田野里消失，搬进了没有窗户的长长的鸡棚。工厂化养鸡诞生了。