And of course, there is cow flatulence: as cattle digest grass or grain, they produce methane gas, of which they expel up to 200 L a day.
当然还有牛的肠胃气涨：当牛消化草或谷物时，每天产生超过200升的甲烷气体。
The narrow lanes of their sleepy village are redolent of cow dung; every home, it seems, has a few cattle or buffaloes, many of them living in pens within residents’ houses.
他们的家乡的窄巷充满了牛粪味，看起来，家家户户都有牛，它们大都被圈在各家的棚圈里。
Prions cause Creutzfeldt-Jakob disease (or “mad cow disease” in cattle) by rearranging the structure of normal proteins in their own image.
朊病毒通过按照自身结构重建正常蛋白结构来引发雅克氏病（或在牛身上引发“疯牛病”）。
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