Two million quarters of corn will not feed so many persons as four millions;but two millions of pounds sterling will carry on as much traffic,will buy and sell as many commodities,as four millions,though at lower nominal prices.

• 200万夸特谷物不能养活400万夸特谷物所能养活的人口，但200万英镑却能与400万英镑做同样规模的生意，买卖同样多的商品，虽然名义价格要低一些。