VOA慢速英语2012.12.19 attention, efficiency, University, 的, 大学

Rebecca949

The rising cost of feed has led agricultural research universities to give greater attention to what experts call "feed efficiency." The University of Idaho has a cattle barn where sensors measure exactly how much food each cow eats.养牛成本的增加使得农业研究大学更加关注专家们所谓的"饲养转化效率".爱达荷大学有个牛谷仓,感应器可以精确测量每头牛可以吃多少食物.
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洋洋Elaine

the rising

clfclf12

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