By this means a link is established between tncreased saving by an individual and increased aggregate investment.

通过这种方式，个人储蓄增加与总投资增加之间建立了联系。

The error lies in proceeding to the plausible inference that, when an individual saves, he will increase aggregate investment by an equal amount.

错误在于继续做出似是而非的推论， 即当一个人储蓄时， 他将等量地增加总投资。

It tells us that, when there is an increment of aggregate investment, income will increase by an amount which is k times the increment of investment.

它告诉我们， 当总投资增加时， 收入增加的量是投资增量的k倍。

They may be found either in home investment or in foreign investment (including in the latter the accumulation of the precious metals), which, between them, make up aggregate investment.

它们可能存在于国内投资或外国投资（包括后者的贵金属积累）中，它们构成了总投资。

And what you see then if you aggregate this up at the macroeconomic level, so if we look at aggregate business investment, which is a percentage of GDP, you also see this falling level of business investment.

如果你在宏观经济层面加总这些数字，如果我们看商业投资的总额，也就是所占 GDP 的百分比，你也会看到商业投资水平呈现如此的下降趋势。

It should not be difficult to compile a chart of the marginal propensity to consume at each stage of a trade cycle from the statistics (if they were available) of aggregate incorne and aggregate investment at successive dates.

根据连续日期的总收入和总投资的统计数据（如果有的话），绘制贸易周期每个阶段边际消费倾向的图表应该不难。