网络可以作为一个可以自由交换思想的神奇平台。
The Internet serves an amazing platform for the free exchange of ideas.
在开了一段时间的1975年福特Bronco之后（那辆车的价值大概是1.5万美元），尽管保时捷Boxster只值9千美元，史蒂芬还是决定进行交换，以作为一个拥有保时捷跑车的少年成名。
After driving around the 1975 Ford Bronco—worth around$15, 000—for a while, Steven decided to trade it for the renown of being ateenage Porsche owner, even though the Boxster was worth only $9, 000.
交换理论的不足及批评的不足关键在于没有看到社会角色关系可以作为划分交换行为的标准。
The inadequacy of social exchange theories and criticisms of it lies in that they failed to see that social role relationships might be used as the criterion for dividing social exchange behavior.
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