科学上网名称：冲鸭搜索
一个知名的搜索引擎。与谷歌的区别在于：不依据用户的个人信息来重新过滤搜索结果。该搜索引擎重视用户隐私，并且避免因个性化搜索而产生的过滤气泡。特点是：对使用相同关键字的用户呈现一致的结果。
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