单词：infection by air or water
单词：infection by air or water 相关文章
VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Bob Doughty. On our program this week, we will tell about an environmental study of the recent wildfires in California. We will also tell how some wat
VOA慢速英语2007年（十二）月
Legionnaires' Disease 1 Legionnaires' disease is a serious and sometimes fatal form of pneumonia 2 . Legionnaires' disease is caused by infection with Legionella bacteria which are found naturally in
英语沙龙2004全年合辑上
Water is a necessary resource for the health and survival of living things. But the availability of fresh water is decreasing for much of the worlds population. The United Nations estimates that about 3.6 billion people currently live in areas that f
2018年VOA慢速英语(十)月
We all have Escherichia coli bacteria in our intestines. These are the good strains of the bacteria. They help us digest our food. There are billions of these bacteria in our intestines and in our feces. Of the hundreds of strains of good E. coli, th
365个英语简短小故事
The northeastern Spanish city of Zaragoza is hosting an international water fair to highlight the importance of this vital and increasingly threatened resource. Spain is no stranger to water scarcity. The country is juggling competing demands of urb
VOA标准英语2008年（七月）
Everybody loves the swimming pool. But how clean is the water in the average backyard or public pool? If you trust chlorine to take care of germs, you're in for a surprise. Chlorine and other disinfec
阅读空间