Take that same good, and perform the service of actually brewing it for a customer, in a corner diner, in a bodega, a kiosk somewhere, you get 50 cents, maybe a buck per cup of coffee.
同样的货物， 你在顾客面前提供泡制的服务， 在一个饭馆里或商店里， 你会得到50美分，也许一美元 每一杯。