马尔堡出血热的发生极其罕见，并且似乎在地理上局限于非洲大陆南部少数国家。

Marburg virus disease occurs very rarely and appears to be geographically confined to a small number of countries in the southern part of the African continent.

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目的：分析营口地区流行性出血热（EHF）的流行规律，为预防和控制当地流行性出血热的发生提供科学依据。

Objective: To analyze the epidemiological characteristics of epidemic hemorrhagic fever(EHF) in Yingkou, and to provide scientific according for further prevention and control of EHF.

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拉沙热发生在所有年龄组的男女中间。

Lassa fever occurs in all age groups and in both men and women.

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It's just how much heat is involved when we change the temperature. Now, the products have some heat capacity associated with them right, it takes a certain amount of heat if we make their temperature change, to either put it in or take it away, depending on which direction the temperature is changing.

问题就是当我们改变温度时,有多少热量发生了转移,生成物具有一定的热容,如果我们改变,它们的温度，就要输入或,提取一定的热量,这取决于温度改变的方向。

麻省理工公开课 - 热力学与动力学课程节选