Reason 5: Has blue-green, rotund, and semi-crystal keys. What's more, the left and right function keys and the navigation key combined form the head of cute Mickey.

理由5：按键是蓝绿色的、圆胖的、水晶透明的，更重要的是，左右的功能键和导航键都是在一起的，构成米奇的脑袋。

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Due to the application of visual navigation technology is becoming more and more popular, and therefore, it is necessary to study visual navigation key technologies and applications.

由于视觉导航技术的应用越来越普及，因此，有必要对视觉导航中的关键技术及应用进行研究。

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This example illustrates three key features of faceted navigation

此示例说明了分面导航的三个关键特性

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Not even the customary navigation key changes that Samsung has implemented in US-spec Galaxy phones to avoid uncomfortable comparisons.

ENGADGET: Editorial: The Galaxy S III in the US is giving Samsung a backbone

The decision to bring the shuttle down came after one of the orbiter's three key navigation tools -- an inertial measurement unit -- stopped working.

CNN: NASA to shuttle: Come home

For a consumer device, the BlackBerry Z10 reaches the baseline, and while it takes a little getting used to, a week or so with the smartphone and the main gestures that replace a hardware key for navigation become intuitive and easily remembered.

FORBES: BlackBerry Has An App Problem With the Z10 and BB10