The surrounding area does not make you suspect the existence of such a great opening in the earth.

VOA: special.2009.10.07

This means that all the area surrounding that Fairview Gardens was mainly farmland back in the 1950s, all growing food, probably a fair amount of it being eaten locally by people.

美景花园的整个周边地区,在上世纪50年代基本上都是耕地,都长着农作物,其中很大一部分被当地人消费掉

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选