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.

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。

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This article points out that producing safe meat depends on three keys, which are source of feed, mechanized slaughtering and safe Distribution.

文章指出，只有抓好饲料源头、机械化屠宰、安全卫生的运输与销售三个主要环节，生产安全放心肉才有保障。

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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 and modest price increases.

玉米是乳品牲口饲料的主要来源。价格上涨将迫使酪农减少饲养牲口数，导致供给减少，价格略增。

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But Monday's post on document-sharing site Pastebin refers readers to a Twitter feed considered a reliable source of Anonymous information.

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The source of contamination - an 80, 000-kg batch of fat that a Belgium company sold to feed mills supplying European farms - did not only contain dioxin.

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Tourism is creating other problems for the local environment, too, including increased population density, over-dependence on wood as a fuel and construction source and the overgrazing and cutting of mountain slopes to feed livestock.

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