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High-Tech Images Show How Viruses Infect Cells At the University of Texas Medical School at Houston, Jun Liu uses a powerful electron microscope to examine E. coli bacteria and the tiny T-7 virus that infects them. Liu says until now, scientists coul
发表于:2018-12-16 / 阅读(33) / 评论(0)
VOA标准英语2013年(一月)
VOA标准英语2013年(一月)