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VOA常速英语新闻:高科技影像揭示病毒如何感染细胞(双语)

Lily85 于2013-01-31发布 l 已有人浏览
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在休斯顿的德克萨斯医科大学,刘军(音译)正用一台高分辨率的电子显微镜观察大肠杆菌和感染它们的微小的t 7病毒。
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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.
在休斯顿的德克萨斯医科大学,刘军(音译)正用一台高分辨率的电子显微镜观察大肠杆菌和感染它们的微小的t 7病毒。

Liu says until now, scientists could only speculate on how this virus injected its genetic material into another cell, because it happens in an instant.
刘说到目前为止,科学家只能推测出这种病毒如何将其基因物质注入另一个细胞内的,因为这一过程就发生在一瞬间。

“Before they inject in, they do not have a channel. After they inject in, they actually degrade the channel, so you never have a chance to see it,” Liu said.
“在注入之前并不存在传输渠道,而在注入之后,这种病毒就将渠道降解了,因此根本没有机会看到它。”

But in a collaborative study with other University of Texas colleagues, Liu used the electron microscope to examine quick-frozen solutions full of bacteria and viruses.
而在同德克萨斯州立大学同行的合作研究中,刘使用电子显微镜来观察充满细菌和病毒的速冻溶液。

“Because when you freeze it, it is kind of like a snapshot that captures some intermediate stage. This is one of the highlights of this study, because we captured this intermediate stage that nobody had seen before,” Liu said.
“冻结的时候就像拍下快照,能捕捉一些过渡阶段。这就是这个研究的重点,我们捕捉到了这个过渡阶段,这是前所未有的。”

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