Retrieval methods and strategies of aero scientific information are expounded.

阐述了航空科技情报的检索方法与检索途径；

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The two retrieval methods simply retrieve the value from the HashMap (Figure 14 and 15).

这两个检索方法只检索hashmap中的值(图14和图15)。

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In the past man take traditional information retrieval methods, such as card retrieval tools, film tools and CD-ROM retrieval.

过去人们主要采用传统的信息检索方法，如：卡片式检索工具、微缩制品、光盘制品等。

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However, the team found that eventually both methods of memory retrieval were as effective in the tasks, meaning that while sleep deprivation affects brain function it does not affect overt behaviour, as previously thought.

BBC: Time spent in bed could make you a better gamer