One acre of farmland use to for raising cows can produce 250 pounds of beef.

出自-2013年6月听力原文

Another factor is the squeeze that conventional dairy farmers have felt as the price of grain they feed their cows has gone up, tightening their profit margins.

2019年12月六级真题（第三套）阅读 Section B

They have painted half of the cows with eyes and left the other half as normal.

2018年12月六级真题（第一套）阅读 Section A

In what's probably the craziest headline I've ever written, I've reported that advances in livestock protection are happening with scientists painting eyes on the butts of cows.

2018年12月六级真题（第一套）阅读 Section A

The unpredictability of global demand and the lag-time it takes to add more cows to a herd to meet demand can result in events like the recent cheese surplus.

2019年12月六级真题（第三套）阅读 Section B

The study, by researchers from seoul, south korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.

2016年高考英语四川卷 阅读理解 阅读D 原文

While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

2016年高考英语四川卷 阅读理解 阅读D 原文