It hints that exchangerelationship is a way which serves and be established for market demand.
此定义暗含交换关系是作为一种服务于市场需要的方式，因市场需要而产生的。
2
An exchangerelationship is all about what you get out of it, the kind of amicable alliance one forges with a client or bartender.
在交换关系中，其全部是你从中获得什么，像那种和睦的联盟——客人或是酒吧招待。
3
If, on the other hand, the ex-follower isn't a friend, you have an exchangerelationship: a mutually beneficial trade in links, information, and follower counts.