农场主每天给这些层架式鸡笼里的鸡喂食，拾取鸡蛋。
The farmer feeds these "battery hens" each day and collects their eggs.
集约化农场经营层架式鸡笼养鸡就是集约化农场经营的一个例子：农场主们管理动物和庄稼，以得到最大产出。
Intensive farming Battery hens are an example of intensive farming: farmers organize their animals and crops to get the maximum food from them.
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