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 synchronized¹ 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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