日期：
来源：雅诚德英语网
Social networking is second only to chat rooms as being the lowest CPM, the worst place to advertise...
社交网络是仅次于聊天室的低CPM场所，广告投放的噩梦地区……
Social networking is second only to chat rooms as being the lowest CPM, the worst place to advertise...
社交网络是仅次于聊天室的低CPM场所，广告投放的噩梦地区……