If it achieves clarity within the limits of its subject.

如果科目的范围内是足够的清楚
In other words, he seems to be saying it is wrong to

换句话说他似乎在告诉我们
demand methodological purity in a subject like politics where there is

将政治学这样多样的与不可预测的科目
always great variety and unpredictability.

按照方法论的模式是错误的
It is the mark, he says, of an educated person,

这是受过教育的人的标记
presumably a liberally educated person, not to demand more precision

大概受过自由教育的人不会比主旨
than the subject matter allows.

要求之外需要更多的精准
But that formulation seems, in many ways, to be question begging.

但这构想本身在很多方面就受到质疑
How much precision does the subject allow?

这科目允许多少的精确度呢
How do we know?

我们要怎么知道呢
There will always, he suggests, appear to be something

他认为研究政治学的方法仿佛
ad hoc about the methods used in the study of politics.

总是特别的