Requirements for Marketing to Occur
For marketing to occur, at least four factors are required: (1) two or more parties (individuals or organizations) with unsatisfied needs, (2) a desire and ability on their part to be satisfied, (3) a way for the parties to communicate, and (4) something to exchange.
营销产生的前提
营销产生至少需要4个条件：（1）两个或两个以上需要未被满足的群体（个人或组织）；（2）每一方有满足需要的意愿和能力；（3）有彼此沟通的途径；（4）有用以交换的东西。
