By the individuals,this labour and expense are usually incurred from other motives than to obtain such ultimate return,and,for most purposes of political economy,need not be taken into account as expenses of production.

• 就个人来说，付出这种劳动和花费通常则是由于其他动机，不是为了最终得到偿还，因而对于政治经济学的大多数论题来说，不必将其作为生产支出来考虑。