They understand that they are getting value for their money: A cow is worth nearly twice as much if it is vaccinated.

VOA: special.2009.11.03

So, it's awkward to have to wait for a cow to get infected before you can vaccinate a population.

在给人们预防接种之前,你只有干等着,直到有一头奶牛感染了病毒才行

耶鲁公开课 - 生物医学工程探索课程节选

So if you want a real milk to drink, go to the cow and tell, "Give me fresh milk."

所以，如果你想喝真正的牛奶了，就去跟牛说，“给我点儿新鲜牛奶吧。”

问上门厨师 - SpeakingMax英语口语达人

Bill invented the method of using a hot branding iron to permanently put the mark of a ranch on a cow's skin.

VOA: special.2011.06.11

It's a big change in some of these very poor villages to get a cow.

奶牛对这些赤贫的村庄来说可是生财之道

耶鲁公开课 - 金融市场课程节选

Better understanding of what makes a cow a cow could lead to better milk and meat production.

VOA: special.2009.05.05

Even--or a large animal like a cow.

而像奶牛这样大的动物就更难保存了

耶鲁公开课 - 生物医学工程探索课程节选

A team led by Steven Salzberg from the University of Maryland also published a cow genome last month in the journal Genome Biology.

VOA: special.2009.05.05

But if I join a fraternity and they pour cow poop on my head and make me stand in the rain for a month wearing pantyhose while they throw rocks at me I then think--after it I think "God, I went through a lot of stuff to get into this fraternity.

但如果我加入之前，他们要往我头上泼牛粪,要我穿着女内裤在雨中站一个月,他们还朝我扔石头,事后我就会想,”为了加入这个兄弟会我吃了不少苦头“

耶鲁公开课 - 心理学导论课程节选

Many of these families also drank more milk, because they bought a cow with their added earnings.

VOA: special.2009.08.17

Right. So, he took fluid from a cowpox lesion on a cow, and he injected it into his children and his wife, reasoning that this would protect them from disease, even though they didn't have as much contact with cows as farmers did.

就是这样,他从奶牛身上的,天花瘢痕中取出液体,将之注入他的妻儿体内,认为这样可以保护他们不得天花,即使他们并不像农民一样时时与奶牛接触

耶鲁公开课 - 生物医学工程探索课程节选

Yet there may be more questions to settle about what exactly makes a cow a cow.

VOA: special.2009.05.05

What if you're talking about a group of people that don't have any cows in their vicinity, let alone a sick cow?

万一你遇到一群人,他们附近连头奶牛都没有,更不用说受病毒感染的奶牛

耶鲁公开课 - 生物医学工程探索课程节选

A cow is released from the station if the computer decides it should not be milked.

VOA: special.2009.05.12

The other problem is that as it was passed from me to another individual, to another individual, then the vaccine could change in some ways that were hard to predict because what accumulates in the lesion in my arm is different in some way than what accumulates in the lesion on a cow.

另外一个问题是当疫苗从我这传到另一人,到另一个个体,疫苗可能会发生某些改变,这种改变很难预测,因为胳膊上积累的病变,与牛身上积累的病变是不太一样的

耶鲁公开课 - 生物医学工程探索课程节选

A dry cow is a cow that is not producing milk.

VOA: special.2009.07.21

When you would take the fluid from the cow, and you would inject it underneath the skin of a person you wanted to protect, then at that site where you injected it, you would get a lesion that looked like a smallpox or cowpox lesion.

当你从奶牛上得到脓液,并把脓液注射到想受到保护的,人的皮肤下面,然后在你注射的地方,你会看到像天花或者牛痘一样的病变

耶鲁公开课 - 生物医学工程探索课程节选

One man named Miller brought a cow to Dawson.

VOA: special.2009.02.11

But what if instead of taking the fluid from a cow, I inoculated--he inoculated me, let's say, and waited until I had the lesion at the right stage, then took some of my fluid and gave it to Brian and Nate and Mirtalla and spread it through the community around me.

但假如不从奶牛那儿取得脓液,假设说是从他那里接种,等到病变程度合适,然后把我的脓液给,布莱恩和纳特还有米特拉,并在我身边的人们之间传播

耶鲁公开课 - 生物医学工程探索课程节选

Now have made a genetic map of a cow.

VOA: special.2009.05.05

Vacca is the, I'm sure there's a Latin scholar in here that will correct my pronunciation, but vacca is the Latin word for cow.

acca是,我确定这里有一个拉丁学者的话,他会纠正我的拉丁发音,vacca是拉丁语中"牛"的意思

耶鲁公开课 - 生物医学工程探索课程节选

The Swedish film "Cows Are Nice" looks at cow farmers trying to make a living in the milk industry.

VOA: special.2009.03.25

The child hurried the cow through the dark forest, following a narrow path that led to her grandmother's home.

VOA: special.2010.04.03

He says the increase in milk production reached a high of more than six kilograms per cow per day.

VOA: special.2009.05.12

In the fifteenth century, a greenhorn was a young cow or ox whose horns had not yet developed.

VOA: special.2010.05.23

She was a milkmaid. She had to get up very early every morning and go to the barn to milk the cow.

VOA: special.2010.11.20

"For large animals like beef, a very large fraction of the nitrogen that enters the cow's mouth is excreted out the back end."

VOA: special.2011.04.05

A calf is a young cow. A young female cow, especially one that has not yet had a calf, is called a heifer: H-E-I-F-E-R.

VOA: special.2009.07.21

More than three hundred researchers studied a female Hereford cow from the American state of Montana.

VOA: special.2009.05.05

Dogie is another name for a young cow, especially one which wanders away from the herd.

VOA: special.2010.03.25