human and cattle 人与牛感染率
There are no cattle, no people, no human footprints at all.
那里没有牛、没有人，连人的足迹都没有。
The entire carcass of cattle not inspected and passed for human consumption is also prohibited, unless the cattle are less than 30 months of age, or the brains and spinal cords have been removed.
那些没有被检查过的和被人类习惯性认为可以消费的完整的牛的畜体也被禁止出售了，除非那头牛小于30月龄或其脑部和脊髓已经被切除。
For most of human history, cattle, sheep and goats grazed on land that wasn't suitable for ploughing, and in doing so they converted inedible grass into edible meat and milk.
在人类的大部分历史时期，人们在不适合耕种的土地上放牧牛羊，这样它们就把不能食用的草转变成了肉和奶。
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