The cinema did not emerge as a form of mass consumption until its technology evolved from the initial "peepshow" format to the point where images were projected on a screen in a darkened theater.
分句1：时间状语从句not…until 的结构，表示“直到…才” The cinema did not emerge as a form of mass consumption until its technology evolved from the initial "peepshow" format to the point 直到科技从最初的西洋镜形式演变到那个程度的时候，电影才以大众化消费形式出现。Emerge as a form of mass consumption可背诵。
分句2：where引导的定语从句，to the point where images were projected on a screen in a darkened theater. where 代替名词point. 影像被投影到幽暗的影院屏幕上。
Edison was more interested in the sale of Kinetoscopes (for roughly $1,000 apiece) to these parlors than in the films that would be run in them (which cost approximately $10 to $15 each).
分句1. 比较状语从句Edison was more interested in the sale of Kinetoscopes (for roughly $1,000 apiece) to these parlors than in the films 相比放映的电影，爱迪生对这些电影放映机(每台一千美元)的销售更感兴趣。
分句2. 定语从句films that would be run in them (which cost approximately)放映的电影(每部10-15 美元)
Previously, large audiences had viewed spectacles at the theater, where vaudeville, popular dramas, musical and minstrel shows, classical plays, lectures, and slide-and-lantern shows had been presented to several hundred spectators at a time.
分句1. Previously, large audiences had viewed spectacles at the theater. 在此之前，一群观众坐在剧场里观看表演。
分句2. Where 引导的定语从句，where代替theater. where vaudeville, popular dramas, musical and minstrel shows, classical plays, lectures, and slide-and-lantern shows had been presented to several hundred spectators at a time.在那里几百个观众可以同时观看轻歌舞剧、流行戏剧、音乐剧、歌唱表演、古典演奏、演讲和胶片演示等。
But the movies differed significantly from these other forms of entertainment, which depended on either live performance or (in the case of the slide-and-lantern shows) the active involvement of a master of ceremonies who assembled the final program.
分句1. But the movies differed significantly from these other forms of entertainment.
电影与这些娱乐形式明显的不同。
分句2. 定语从句，which指代these other forms of entertainment。其他娱乐形式要么依赖现场表演，要么依赖于主持人的积极参与。
分句3. 定语从句，who 指代a master of ceremonies。这些人串联整个节目。
Even though early exhibitors shaped their film programs by mixing films and other entertainments together in whichever way they thought would be most attractive to audiences or by accompanying them with lectures,分句1: 让步状语从句Even though early exhibitors shaped their film programs by mixing films and other entertainments together or by accompanying them with lectures. 尽管早期的电影放映者通常在电影放映时伴有现场表演或者实现录下来的材料。
分句2：whichever 引导的让步状语，他们会以任何吸引观众的方式播放。
分句3：their creative control remained limited. 这些材料能在没有表演者或者表演者较少参与的情况在电影院中轻松地再现。