translation.en: Then, about 150 years ago, there was a revolution in recorded media other than print: first photos, then recorded sound, then movies, all encoded onto physical objects.
translation.zh: 然后，大概150年以前， 除了印刷，在记录媒体有个转变。 首先照片，然后录制声音， 然后电影，所有都转变为有形实体的编码。