VOA慢速英语:Study: Use of Antibiotics in Farm Animals Expected to Grow

词汇讲解：
 
1. prosperity n.繁荣; 兴旺
例句：Everywhere is a scene of prosperity. 
到处呈现一片兴旺景象。 

2. infection n.<医>传染，感染
例句：No other infection so quickly slays. 
再没有别的疾病会造成如此迅速的死亡。 

3. increase vt. 增加，增大
例句：He had the audacity to ask for an increase in salary. 
他竟然厚着脸皮要求增加薪水。 

4. raise v.提升; 增加; 养育
例句：A smaller number of families may raise children. 
少数家庭可以抚养孩子。 

5. intensive adj.加强的，强烈的
例句：He consumed those books in three or four nights of intensive reading. 
他花了三、四夜的功夫专心读了这几本书。