个人对个人: consumer-to-consumerp2person to personptop(c2c):person to person
建: Ⅰ动词1.(建筑) build; construct; erect 短语和例子建电站 build a power station; 新建的工厂 newly-built factory; 重建家园 rebuild one's homeland; 大楼边上又扩建了一些教室。 extra classrooms were built out from the main block.
