现在它们却生长在人工撒网里，打捞上来的数量是鱼场养殖数量的十倍。

Now they are born inside nets instead, with ten times as many farmed as fished.

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更进一步讲，扩大庭院养殖规模几乎是不可能的。 鸡可吃的虫子就那么多，每个农户可以照看的鸡的数量也有限。

Moreover, it is almost impossible to scale up a farmyard operation: there are only so many insects to eat, and so many hens one family can look after.

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现在，有的农场开始回归有机养殖，停止使用抗生素后一年，具有抗药性的病原细菌数量大为减少。

But farms that turn to organic practices including a ban on antibiotics can greatly reduce antibiotic-resistant bacteria within only the first year of the change.

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