Within half an hour, all six of the hidden objects had been found.

不到半个小时，所有六个隐藏的目标物都被发现了。

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Taking duplicate IDs for example, there are some hidden objects, which are not shown to users, but which are used for some functional purposes such as analytic scripts.

以重复ID为例，有些隐藏对象不会显示给用户，只是供分析脚本使用。

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There are three main approaches: enhanced x-rays to spot hidden objects, sensor technology to sniff dangerous chemicals, and radio frequencies that can identify liquids and solids.

这种改进的技术包括下列三个步骤：利用增强的X射线显示出藏匿的物品、利用传感技术搜寻危险化学品，并利用无线射频技术识别液态和固态物质。

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The kit is to be replaced with scanners that show hidden objects on an avatar.

BBC: TSA to phase out Rapiscan 'naked scanners'

The controversial technology, first used in a U.S. airport in 2007, can find hidden objects that metal detectors can't.

CNN: Body scanners not 'magic technology' against terror

The Oregon has modes for hiking, driving and geocaching, the game of finding hidden objects using only GPS locations posted on Web sites.

FORBES: The compleat option for the compleat wayfarer.