疾病传播

Assuming that the connect and infectious rate is a periodic function, we study the asymptotic behavior of the solution for this model.

在模型中，假设接触感染率为时间的周期函数，研究模型解的渐近行为，得到了疾病传播的阈值。

It would spread rapidly and come to be known as "The Black Death".

这次疾病传播得更为迅速，被人们称作是"黑死病"。

Todays study estimated the contagiousness of the disease by analysing the number of people travelling to Mexico who became infected, and comparing that with a study of a Mexican village where the disease has spread.

今天的研究通过对在墨西哥旅游而受到感染的人数的分析，再对比墨西哥一个村庄疾病传播的研究，对该病毒的接触传染力进行了估计。

It is the way to prevent disease effectual that use soap to wash hands.

用肥皂洗手是有效防止疾病传播的一种方式。

If you contact with someone else, you will probably promote the spread of diseases, so, wear an exposure suit.

如果你与另一个人有过身体接触，你将可能帮助疾病传播，所以，要穿戴防护。

But if small area and building inside of gearing and management of the design, construction of the water supply system maintenance isn't appropriate, may result in fluid matter drive pollute of phenomenon, cause the disease spread, endanger the people's health and the life directly.

但若小区和建筑内的给水系统设计、施工安装和管理维护不当，就可能造成水质被污染的现象，导致疾病传播，直接危害人民的健康和生命。

"Very frequent hand-washing is something that we talk about time and time again and that is an effective way to reduce transmission of disease," Dr.

"我们反复强调一定要非常频繁的洗手，这对减少疾病传播是非常有效的。"

Washing hors dawn soap is first of the ways to prevent diseases.

用肥皂洗手是有效防止疾病传播的一种方法。

Towns were crowded and insanitary; people were often malnourished; and disease spread fast.

城镇里又脏又挤；人们常常营养不良；疾病传播迅速。

"It covered all of the contemporary issues of public health, from environmental health through infectious disease transmission," said Jerrold M. Michael, a former assistant surgeon general and a former longtime dean of the University of Hawaii School of Public Health, who worked on the report.

" ，它涵盖了所有的当代公共卫生问题，从环境健康传染性疾病传播，说："暗淡无光米迈克尔，一名前助理外科医生将军和一名前资深主任，夏威夷大学公共卫生学院，任职於该报告。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。