那是大工业化的结果。专门breed不同的鸡，如肉鸡，蛋鸡。蛋鸡在chicken house，日光的长段是长年控制的。

来源: stone_cold_fox 于 2015-12-05 14:47:30 [旧帖] [给我悄悄话] 本文已被阅读：次

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