他养了几头奶牛。
The feeding of dairy cows has undergone a revolution.
奶牛的喂食已经历了一场革命。
The dairy farm keeps many dairy cows.
乳牛场饲养了很多乳牛。
We have lots of dairy herds, dairy cows.
我们拥有许多乳牛群和奶牛。
They raise dairy cows, hogs and chickens, too.
他们还饲养奶牛、猪和鸡。
Dairy cows that are eating grass and clover as part of mixed-arable rotation.
进食杂草及苜蓿的奶牛如同混合耕地循环的一部分。
Playing classical and soothing music can increase the milk yield of dairy cows.
播放古典和轻松音乐可以增加奶牛的产奶量。
Dairy cows that are eating grass and clover as part of mixed - arable rotation.
进食杂草及苜蓿的奶牛如同混合耕地循环的一部分。
To maximize milk production, dairy cows are kept pregnant their entire short life.
为了尽可能多的得到奶制品，母奶牛短暂的一生只得不停怀孕。
The results showed that dairy cows were in heat stress in the sustained hot temperature.
结果表明：在持续高温天气下奶牛处于热应激状态。
The retained fetal membranes has caused great ecological damage to the breeding of dairy cows.
奶牛产后胎衣不下对奶牛业造成极大的经济损失。
Dairy cows must calve every year to keep producing milk, and only half their offspring will be female.
奶牛必须每年哺乳才能产生牛奶，生下的小牛中只有一半是母牛。
We have lots of dairy herds, dairy cows. But managing dairy and beef cows is a totally different thing.
我们有许多的奶牛种群和奶牛，但管理奶牛和菜牛是完全不同的事情。
And the potential within California, with nearly two million dairy farms, ah, dairy cows, is tremendous.
而在加利福尼亚有几乎两百万个奶牛场，哦不，是奶牛，因此潜力是巨大的。
However, though Iowa has lots of pigs, distillers' grains work much better as feed for beef and dairy cows.
然而，尽管艾奥瓦有很多猪，酒糟谷对肉牛和奶牛其实更好。
Lower reproductive performance of high producing dairy cows is associated with negative energy balance (NEB).
高产奶牛繁殖性能下降与能量负平衡(NEB)有关。
She says Russians have a lot of experience with dairy cows in barns, but not with beef cattle on open rangeland.
她说俄罗斯对牲口棚中养殖奶牛很有经验，但对户外牧场养殖肉牛没有太多经验。
The oil origanum could increase the percentages of milk fat and enhance the antioxidation function of dairy cows.
牛至油可以提高牛奶乳脂率含量和增强抗氧化功能。
The effects of different diets on dry matter intakes( DMI)and digestion in lactating dairy cows were investigated.
本试验旨在研究在不同日粮条件下对奶牛干物质采食量（DMI）及养分消化率的影响。
The National Milk Producers Federation "retired" 101,000 dairy cows this month and on July 10th announced another cull.
本月初，101,000头奶牛从全国牛奶生产者联合会“退休”，7月10日宣布宰杀它们。
The National Milk Producers Federation "retired" 101, 000 dairy cows this month and on July 10th announced another cull.
本月初，101,000头奶牛从全国牛奶生产者联合会“退休”，7月10日宣布宰杀它们。
EPA projected that operations with more than 3, 200 dairy cows or 34, 100 pigs would likely meet the reporting requirement.
EPA预计超过3200头奶牛或34 100猪的农场作业可能会达到审报要求。
The reasons of negative energy balance appeared on dairy cows, disserves and prevention measures were introduced in this article.
作者简述了奶牛能量负平衡产生的原因、对奶牛的危害及其防治措施。
The effect of oil origanum additive on milking performance and antioxidative function of dairy cows was observed through experiment.
试验通过添加牛至油来观察其对奶牛的产奶性能及抗氧化功能的影响。
One was scientific feeding and management on the basis of different nutrient requirement for different developing stages of dairy cows.
一是根据奶牛各饲养阶段对营养需要的不同进行科学合理的饲料搭配与管理；
About 19,000 farms are designated as “concentrated animal feeding operations”, with more than 100,000 hens, 700 dairy cows or 2,500 pigs.
大约一万九千家禽养殖场被称为“集中喂养动物作业” （1），这些养殖场可饲养十万只鸡，七百头奶牛或两千五百头猪。
Objective: To investigate the effects of selenium enriched yeast on antioxidative activities and immune functions in pregnant dairy cows.
目的：研究富硒酵母对妊娠奶牛抗氧化能力和免疫功能的影响。
Three forms of the organization on milk resource base are: standardized dairy cow raising area, dairy cows cooperative, and joint stock system.
这三种组织形式分别是：标准化奶牛养殖小区、奶牛合作社和股份合作制。
Three forms of the organization on milk resource base are: standardized dairy cow raising area, dairy cows cooperative, and joint stock system.
这三种组织形式分别是：标准化奶牛养殖小区、奶牛合作社和股份合作制。
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