This, to the best of my understanding, is the substance of Professor Pigou's Theory of Unemployment-the only detailed account of the classical theory of employment which exists.

据我所知，这就是庇古教授的失业理论的实质内容——对现存的经典就业理论的唯一详细说明。

The saving and the investment, which are relevant to the theory of employment, are clear of this defect, and are capable of objective definition, as we have shown above.

与就业理论相关的储蓄和投资显然没有这个缺陷，并且可以客观定义，正如我们上面所展示的那样。

This further step is an integral part of our theory of employment, since it establishes a precise relationship, given the propensity to consume, between aggregate employment and income and the rate of investment.

这一进一步的步骤是我们就业理论的一个组成部分，因为它在给定消费倾向的情况下，在总就业和收入与投资率之间建立了精确的关系。