I believed this to be a development and clarification of Wicksell's 'natural rate of interest', which was, according to him, the rate which would preserve the stability of some, not quite clearly specified, price-level.

我认为这是对 Wicksell 的“自然利率”的发展和澄清，根据他的说法，自然利率是保持某些未明确指定的价格水平稳定的利率。