像所有的哺乳动物一样，牛能lactate。

Cows, like all mammals, lactate.

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生活在繁密的草原的牛能生产更好的天然肠线么？

Do cows raised in climates that produce lush pastures produce better natural gut?

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理论上，以这种方式一头牛能提供的汉堡量比得上当今屠宰一百万头牛的产量。

In theory, one cow could thus supply as many hamburgers as a million slaughtered animals can today.

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There was an opening particularly in payments.

不用花多少钱就能雇到牛人。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

If your plan is to accelerate a 3 kg mass with an acceleration of 2 meters per second, you better have a rope that can furnish that force and it can take the tension of 6 Newtons.

如果你想用 2 米每秒平方的加速度,去拉一个 3 千克的物体,那么你就需要一根能提供拉力的绳子,并且它能够承受 6 牛的张力

耶鲁公开课 - 基础物理课程节选