流行病

Through reviewing the reproductive toxicity of some major environmental chemical pollutants, including endocrine disrupters, organic phosphor and chlorine pesticides, organic solvents, and some metals such as lead, cadmium, mercury, manganese, the paper finds that all these ECPs have different extents of toxic effects to experimental auimals on procreation, gestation and even on offspring, some of which have been evidenced by the population epidemiological studies.

本文通过对邻苯二甲酸酯类和双酚A等内分泌干扰物、有机磷和有机氯农药、常用有机溶剂以及常见金属的生殖毒性研究的综述，发现它们均在不同程度上造成对实验动物的生殖毒性、妊娠毒性以及对子代的毒性影响，其中部分在人群流行病学研究上得到证实。

DATA SOURCES: Articles on carcinoma of large intestine published between January 1980 and December 2003 were retrieved in NCBI Entrez PubMed with the key words of "carcinoma of large intestine, epidemiology and prevention" and the language restricted to English.

资料来源：应用计算机检索NCBI Entrez PubMed 1980-01/2003-12相关大肠癌流行病的文章，检索词为&large intestine cancer，epidemiology and prevention&，限定文章语言种类为English。

If nothing else has tipped you offyet, that switch from donkey to ' ass ' should be evidence enough that Oliphant is not really worried about epizootics

如果你现在还没有悟出什么，那么用词从驴转到ass就足以证明奥列芬特并非真正为牲畜流行病而担忧。

Infection by baculoviruses not always results in insect death, and persistent baculoviruses are popular haboured in insect populations. Moreover, the persistent infection can be transformed to a replicative and infective state caused by stress factors, which can cause epizootics in outbreak populations.

杆状病毒感染昆虫宿主并不一定导致昆虫死亡，其持续感染在昆虫种群中普遍存在，且在某些刺激条件下，持续感染可被激活为增殖性感染并引发病毒流行病爆发。

Methods Descriptive epidemiological method was adopted to analyze occupational health examination results of 1300 workers with hazard exposure and occupational hazards monitoring results in July 2007 and February 2008 in an automobile manufacture enterprise of Shunyi District statistically.

采用描述性流行病学方法，对北京市顺义区某汽车制造企业2007年7月和2008年2月职业病危害因素监测结果和接触有害因素的1300名职工健康检查结果进行统计和分析。

Famines, wars, and epidemics, such as the plague and cholera, killed many people.

饥荒、战争和瘟疫、霍乱等流行病杀死了很多人。

Objective To determine the prevalence and evaluate the risk factors of canine echinococcosis based on a field survey of dog infections with Echinococcus granulosus and E.

摘要目的对四川省甘孜县达通玛藏族牧区家犬感染细粒棘球棘球绦虫和多房棘球棘球绦虫进行流行病学调查和评价感染风险因素。

In patients with facet hypertrophy, foraminal narrowing can actually cause radicular symptoms.72–74,135 A second confounding factor is that the best prevalence studies used comparative MBB to estimate l-z joint pain.

伴有小关节增生，椎间孔狭窄的患者亦可产生确切的根性疼痛症状。另一个混杂因素是研究流行病学时最好用对照性的MBB来估计小关节疼痛。

College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou 450002; 2China Animal Health and Epidemiology Center, Qingdao 266032; 3College of Animal Science and Technology, Northwest University of Agriculture and Fores

李和平1、2，吴发兴1，李晓成1，陈德坤3（1中国动物卫生与流行病学中心，青岛 266032； 2河南农业大学牧医工程学院，郑州 450002； 3西北农林科技大学动物科技学院，杨凌 712100

Concept of distribution of disease、arithmetic of indicator of disease frequency、prevalence intensity classification、cross-sectional analysis method and analysis method of birth cohort study、two basis in pathogeny estimation of Immigration Epidemiology.

疾病分布地概念、疾病频率指标算法、流行强度分级、横断面分析法和出生队列分析法、移民流行病学在病因判断上的两个根据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。