When streaming your site, have key navigation links appear first, in case the user wants to get to another area in the site.

展现站点的时候，先显示关键的导航链接，以便用户需要进入站点的另一个区域。

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To monitor and control the navigation system completely, the key navigation equipment and equipment environment status of the navigation station must be monitored and controlled emphatically.

要全面监控导航系统，需要重点监控导航台的关键导航设备和设备环境状态。

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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

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