The time was in the early 70s, so factory farming was not well-known, was not as dominated as it is today, but it still existed.

那时是70年代早期，工厂化养殖并不为很多人所知,也不如今天这样占主导地位，但当时已经出现了这种方式。

普林斯顿公开课 - 人性课程节选

History is... in Harlem is dominantly where the black culture, African history

哈莱姆区的历史是……这里以黑人文化、非洲历史为主导，

对哈莱姆好奇吗？ - SpeakingMax英语口语达人