玉米是乳用牛饲料的主要来源，价格上涨将迫使农民减少饲养牲口数，进而导致供给减少。
Corn is a prime source of feed for dairy cattle and the rising costs could force farmers to reduce their herds, leading in turn to reduced supplies.
事实上，当他们在完成采访我父亲那一条时，背景中能听到我的弟弟们正在将牛赶出谷堆。
In fact, as they were interviewing my father for the piece, my brothers could be heard in the background, chasing cows out of the corn.
几百年前，农民建造牛舍将热量从牛身上传导到农舍。
For centuries, farmers have built their barns to allow warmth from the cows to heat the farmhouse.
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