处于社交圈中的人们可能会参与一些有用信息的传播，比如哪些地方有吃的，或者好的投资选择等等。
People in the middle of a social network could be privy to useful gossip, such as the location of food or good investment choices.
所以说广告的优点就是它不仅能让我们更多的了解产品本身，同时广告也是传播信息，开阔眼界，增加知识的好方法。
So the advantage of advertisement is that it can give us more information about the product and at the same time it is also a good way to spread the information, open our mind and broad our horizon.
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