It is difficult to conceive that a capital should be employed in any way which may not be classed under some one or other of those four.

很难想象资本的使用方式不能归入这四种方式中的某一种。

In his letter to shareholders for 1980 he reminded them that profits must rise in proportion to increases in the price level without an increase in capital employed, lest the firm starts " chewing up" investors' capital.

在1980年致股东的信中，他提醒他们，利润必须与价格水平的上升成比例增长，而不能增加所用资本，以免公司开始“蚕食”投资者的资本。