The problem is, if you buy a $40,000 incubator, and you send it off to a mid-sized village in Africa, it will work great for a year or two years, and then something will go wrong and it will break, because you don't have a whole system of spare parts, and you don't have the on-the-ground expertise to fix this $40,000 piece of equipment.
问题是，如果你买了4万美元的保温箱， 你把它送到 非洲的中型村庄， 它能正常工作一年，或两年， 然后某件东西会出问题，机器将破损， 因为你没有整个系统的备件， 它将永久破损， 并且你没有当地专业人员来维修 这种4万美元的设备。