一切都由个几月前开始。

It all began more than a month ago.

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这本书本月就出，你们可以,确定这章节是几月前写成的。

Since the book is coming out this month you can be sure that the chapter was written a few months ago.

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但事实上，对环境而言，所有肉食的生产所需资源是谷物和豆类生产的指数倍，此问题曾在几月前奥杜邦协会(Audubon Society，美国一保护野生动物和自然资源协会，译者注)的杂志上讨论过。

But in fact, environmentally, all meat requires exponentially more resources to produce than eating grains and beans, as eloquently discussed in the Audubon Society's magazine a few months back.

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