Before publishing the package to IBM Cognos BI, ensure that the fake fact is included in the package as a hidden object.

在向IBM Cognos BI发布包以前，确保伪事实作为隐藏对象包含在包中。

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Watch as the friendly puppets reveal unique characteristics of the object - can you guess the hidden object by its particular sound, its signature nose, or number of legs?

观看友好的玩偶揭示物件的独特性质-通过它的独特声音、它标志性的鼻子或者腿的个数，你能猜猜藏着的事物吗？

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Watch as our friends reveal unique characteristics of the hidden object - can you guess what it is?

观看我们的朋友们揭示隐藏物件的独一无二的特征-你能猜猜它是什么吗？

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Cloaking relies on guiding light waves such that waves from a hidden object do not reach the eye.

BBC: Invisibility cloaking benefits from crystal-clear idea

Until now, these have relied on what are known as "metamaterials" - artificially-produced materials that have microscopic variations in their properties that guide incoming light waves around or over a hidden object.

BBC: Invisibility cloaking benefits from crystal-clear idea

The BBC and others noted, for example, when a flat region was hidden under a "carpet", when the carpet hid a 3D object, and when the carpet was dispensed with and a 3D object was hidden in "free space".

BBC: Invisibility cloaks: Will we ever really have them?