By what criterion... can we distinguish among the numberless effects, that are also causes, and among the causes that may, for aught we can know, be also effects, - how can we distinguish which are the means and which are the ends?
的标准……我们能在无数的结果中加以区分吗?这些结果也是原因，而在我们所知道的原因中，也许也是结果，我们怎么能区分哪些是手段，哪些是目的呢?
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Among
Criterion
Means