translation.en: This innovation is at the heart of the transformation of American agriculture, and the rise of Chicago to a global market, agricultural market, superpower from where it was, a small regional town.
translation.zh: 这个活动就是美国农业转变的核心， 也是芝加哥从一个本地小镇上升至国际市场， 农业市场，超级大国的主因。