"We haven't found evidence of infected pigs," said Ian Lipkin, a Columbia University epidemiologist and member of the World Health Organization's surveillance network.

“我们还没有发现受感染的猪，”哥伦比亚大学流行病学家和世界卫生组织监测网络成员伊恩·利普金说。

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It brings many problems and puzzlements because of excessively access to the network and seriously affects the health of university students' body and mind.

因过度上网而产生的网络成瘾症给大学生带来诸多的问题和困惑，严重影响他们学业和身心的健康成长。

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In the physical health of students, the network games affect university student's vision, cause them to appear the language function barrier, cause their physical quality to drop.

在大学生身体健康方面，网络游戏影响影响大学生的视力，使他们出现语言功能障碍，导致他们身体素质下降。

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But Zafar Adeel of the United Nations University International Network on Water, Environment and Health, an expert on water management and a leading author of the report, warned that more needed to be done to combat desertification.

CNN: Growing deserts 'a global problem'

Professor Hugh Pennington, a leading microbiologist based at Aberdeen University, told the Times newspaper the UK public health laboratory network was envied in America.

BBC: Infectious diseases warning