产下

Dairy cows often experience metabolic diseases because they can't take in enough nutrition to meet the demands of the milking machine. Their systems may run short of calcium or magnesium, bringing them to the point where they physically collapse.

乳牛也经常感染新陈代谢的疾病，为了达到一定的产乳量，他们无法获得充足均衡的营养；严重缺乏钙和镁的情况下，他们的身体濒临崩溃的边缘。

The fermentation of mucor protease in condition of liquid submerged culture of AS3.2778 and the characteristics of the protease were studied in this research.The Application of mucor protease in the novel ways of sufu fermentation were also studied in this paper.

本文主要研究了在液体培养条件下雅致放射毛霉产蛋白酶特征和蛋白酶的酶学性质，并对雅致放射毛霉蛋白酶在新型腐乳生产中的应用进行了探讨。

Cows in perinatal period were used in the experiment. Through clinical symptom and laboratory examination, they were divided into six groups that were healthy multiparity cows, healthy primiparity cows,cows with fatty liver disease, cows with ketosis and cows with retention of fetal membrance, mastitis in cows.

本实验以进入围产期的57头奶牛为研究对象，通过实验室检查结合临床症状找出其中健康的经产牛、健康的头胎牛及患酮病、脂肪肝、胎衣不下、乳房炎的自然病例。

In this thesis, some experiments were conducted to investigate the effects of different production environments on sows" behavioral Stereotypies, by observing the performance of Stereotypies of the different breeds of gilts or multiparous sows" in different production systems.

本论文通过对不同生产环境下，不同品种、不同产次的母猪在不同生理阶段的行为规癖的表现特点及规律进行观察，全面系统地对不同生产环境对母猪行为规癖的影响进行了研究。

You would like to ask the next, I am prepared to choose natural childbirth, but many people say that vaginal birth should be cut, there are those who will tear, but my mother She told me that when I did not cut ah!

还有一个问题想问下大家，我准备选择自然分娩，但是很多人说顺产要把阴道口剪开，还有的人会撕裂，但我妈妈跟我说她生我的时候就没有剪啊！

PCR and electron microscope were used to detect the virus in the ovaries,eggs atdifferent development stages,and naupliuses of infected broodstocks of P.chinensis.Thevirus was not found in eggs just spawned or not,but in the connective tissue of ovary.Thedetected results of nauplius were positive,and virus-like organisms were found to invadethe epidermis tissue of nauplius.The virus was not detected in the yolk as well as inner andouter membrane of egg.

本文利用PCR及电镜技术，对中国对虾染病亲虾的卵巢和各期卵及其刚孵化出的无节幼体进行了病毒检测，染病亲虾刚产的卵及未产出的卵均没有发现病毒存在，在卵巢的结缔组织中检测到病毒存在，刚孵化出的无节幼体PCR检测结果呈阳性，电镜下观测到有病毒样颗粒侵染无节幼体的上层表皮组织。

This research analyzed the production of the newsreel and documentary in Taiwan, taking into account of society, economy, history, in order to understand their roles and significances in different period of time.

的影响。本文将台湾新闻与纪录片的产制，置在特定社会、经济、历史脉络中加以分析，以了解在各不同历史阶段下，所承担的角色与意义。

We described that the nitro group is a stronger electron withdrawing and meta activating characters than the imide group, the amino and hydroxy are both electron donating groups and had ortho, para activating characters. The methyl group might have a steric hindrance effect in this reaction. Our results indicated that methyl group at the ortho position of the amino group on the benzene ring, the steric hindrance effect became stronger.

另一方面，由产率上的结果来看，可以得知硝基为强力的拉电子基团，会减少邻位和对位胺基的电子密度比间位多；而氢氧基与胺基是供电子基团，会增加邻位和对位胺基的电子密度比间位多；甲基取代对反应则只有立体障碍的影响，而且与反应的氨基成邻位存在下影响最大。

In chapter 4 an abnormal reaction that the nitro group of 1-aryl-2-nitroethenescan be easily replaced by the organic moity of FG-RZnI using Ni〓 and tertiaryamine as catalyst was first given. The experimental results show that in the presenceof catalytic amount of Ni〓 and tertiary amines, the reaction of FG-RZnI andl-aryl-2-nitroethenes give the substitution products l-aryl-l-alkene, instead ofMichael addition products.

通过实验发现，在催化量的Ni〓及叔胺催化下， l-硝基-2-芳基乙烯与烷基碘化锌并不进行Michael加成反应，而是发生1-硝基-2-芳基乙烯中硝基被取代的反应，生成了高产率的1-芳基-l-烯烃，由于此反应的原料易得、反应条件温和、产物的产率高，因而是合成l-芳基-1-烯烃的有效方法。

The catalytic property was tested by hydrogenation ofα-octene, cyclohexene and nitrobenzene in ethanol, octane and cyclohexane were prepared at normal temperature and under hydrogen pressure in a 100% yield, respectively.

聚乙烯吡咯烷酮负载纳米钯的超细纤维状催化剂，钯纳米颗粒直径在15 nm以下，并且纳米颗粒负载分布均匀，在室温下催化α-辛烯的加氢反应，产率可达到100%。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。