Those, therefore, who have the command of more food than they themselves can consume, are always willing to exchange the surplus, or, what is the same thing, the price of it, for gratifications of this other kind.

因此，那些掌握的食物量超过他们自己消费量的人，总是愿意用剩余的食物，或者说是食物的价格，来换取其他类型的满足。