从而得知未知信息（unknown information）：the finished time. 进而得出本题的测试点（testing point）：When was her research finished?
基于44个网页-相关网页
Search engines can be used to locate a huge number of information on network as well as some unknown information can be quickly found.
利用搜索引擎能够查找数量庞大的网络信息,并可以迅速查到未知信息。
参考来源 - 中文搜索引擎的设计与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
Rule reasoning can deduce unknown information from known fact.
规则推理从已知事实推导出未知信息；
The uncertain information includes fuzzy information, grey information, random information and unknown information.
不确定性信息包括模糊信息、灰色信息、随机信息和未确知信息。
The number surrounded by curly brackets indicates that there is some generally unknown information that will replace the brackets and number.
花括号括起的数字表示有一些未知信息将替换括号和数字。
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