The reason the film industry started in these cities is because there were plenty of trained professionals (acrobats, dancers, actors, and stagehands) from vaudeville, the performing arts theater that was popular at the turn of the century.

• 影片工业在这些城市发源的原因在于，它们拥有许多来自轻歌舞剧且受过训练的专业人员(特技人员、舞者、演员及舞台工作人员)，这是世纪交替时，广为流传的一种表演艺术剧场。