散养的鸡四处抛食，一个星期可以下1-2个蛋，饲料成本为零，一年可以净得50—100个鸡蛋。
A free-range hen scratching around might lay one or two eggs a week. Feeding her costs nothing, giving a net gain of 50-100 eggs a year.
散养的鸡四处抛食，一个星期可以下1-2个蛋，饲料成本为零，一年可以净得50—100个鸡蛋。
A free-range hen scratching around might lay one or two eggs a week. Feeding her costs nothing, giving a net gain of 50-100 eggs a year.
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