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A barren sow is never kind to pigs.

不生育的母猪从不善待猪。

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Barren

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For each of us who appear to have had a successful experiment there are many to whom their own experiments seem barren and negative.

对于我们每一个似乎有过成功实验的人来说，他们自己的实验对许多人来说似乎是空洞和消极的。

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