(iii) Thirdly, the well-known, but unavoidable, element of vagueness which admittedly attends the concept of the general price-level makes this term very unsatisfactory for the purposes of a causal analysis, which ought to be exact.

(iii) 第三，公认的伴随一般价格水平概念的众所周知但不可避免的模糊因素使得这个术语对于因果分析的目的来说非常不能令人满意，因果分析应该是准确的。