一边看着电视上的选秀节目，一边用手机发微博评论。这样的场景大家应该都不陌生吧？随着便携电子设备的普及，每个家里除了电视机那个大屏幕之外，同时还亮起不少小屏幕，我们将其统称为“第二屏幕”。
Second screen, some times also referred to as "'companion device'", is a term that refers to an additional electronic device (e.g. tablet, smartphone) that allows a television audience to interact with the content they are consuming, such as TV shows, movies, music, or video games, extra data is displayed on a portable device synchronized with the content being viewed on television.
第二屏幕，有时也被称为“伴侣设备”，指看电视时能同时与电视节目内容互动交流的电子设备，如平板电脑或智能手机等。电视上进行的节目、电影、音乐或者视频游戏等在便携设备上也会有同步的相关内容显示。
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