There were a large numbers of pigs fed in Henan province , where the prevalence of Swine Fever was very severe.

河南省是我国的养猪大省，也是我国猪瘟流行严重的地区之一。

With the prevalence and popularity of web 2.0 in recent years, research and application on social networks (SNS) is becoming a focus of public attention.

近年来随着Web 2.0的流行和普及,对社会关系网络(SNS)的研究和应用逐渐成为关注热点。

Such equipments are used for processing the products prevalence of poor quality, lack of variety and high cost,availability such a long period, therefore is uncompetitive on world and domestic markets.

用这种装备加工出来的产品普遍存在质量差、品种少、成本高、供货期长等现象,因而在国际、国内市场上缺乏竞争力。