Label the master slide: Specify a unique label in the text box.

幻灯片母版标签：在文本框中指定一个唯一的标签。

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Link, relink, or remove link to master slide: in the master slide drop-down list, make appropriate selection.

链接，取消链接或者移除主幻灯片链接：在主幻灯片下拉列表中，做出一个适当的选择。

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Master slide maintains its own timeline.

主幻灯片有自己的时间轴。

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Both do the basics: create slides using text, tables, charts, graphics and other multimedia elements, let you apply a master design to them, organize the slides into a slide show and play them or print them out as a presentation.

FORBES: Keynote Vs. PowerPoint