The aggregate demand function relates any given level of employment to the 'proceeds' which that level of employment is expected to realise.

总需求函数将任何给定的就业水平与该就业水平预期实现的“收益”联系起来。

But he identifies the state of demand with the Real Demand Function for Labour, forgetful of how narrow a thing the latter is on his definition.

但他将需求状态与劳动力的实际需求函数联系起来，忘记了后者在他的定义中是多么狭窄。

The equations which, as he says, 'form the starting point of the enquiry' into the Real Demand Function for Labour are given in his Theory of Unemployment, p. 90.

正如他所说，方程式“构成了对劳动力实际需求函数的调查的起点”，在他的失业理论中给出了，p。 90.

The value of D at the point of the aggregate demand function, where it is intersected by the aggregate supply function, will be called the effective demand.

总需求函数与总供给函数相交点处的 D 值称为有效需求。

He concludes (op. cit. p. 253) that unemployment is primarily due to a wage policy which fails to adjust itself sufficiently to changes in the real demand function for labour.

他得出结论（op. cit. p. 253），失业主要是由于工资政策未能充分调整自身以适应劳动力实际需求函数的变化。

So far we have established the preliminary conclusion that the volume of employment is determined by the point of intersection of the aggregate supply function with the aggregate demand function.

至此，我们初步建立了就业量由总供给函数与总需求函数的交点决定的结论。

But, in the main, it is the part played by the aggregate demand function which has been overlooked; and it is to the aggregate demand function that we shall devote Books III and IV.

但是，总的来说，人们忽视了总需求函数所起的作用；我们将在第三卷和第四卷中讨论总需求函数。