键顶的可视表面应该是无光泽的。

The top visible surface of the keys should be unpolished.

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点击"R"键来使地图的北方对应屏幕的正上方，并使用从建筑物顶的俯视图查看当前位置。

Press the “R” key to align Northto the top of the screen, giving a direct overhead (plan) view.

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这次可能的变化紧随去年脸谱网引进“我顶”键，它允许用户通过点击“我顶”，展示他们在Facebook.com和其他网站上喜欢的内容或品牌。

The potential changes follow Facebook's introduction ofits "Like" button last year, which users can click to show they likea piece of content or a brand on Facebook.com and other sites.

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