translation.en: He was interested in productivity -- I think it's something that concerns all of us -- but it's easy to measure in chickens because you just count the eggs.
translation.zh: 他对生产率很感兴趣—— 我觉得他的研究关系到我们每个人—— 但计算鸡的生产率很简单， 只需要数数鸡蛋就行了。