His experiments were the first clear demonstration of the role of a virus in one type of malignant tumor.
他的实验首次清晰地证明了病毒在一种恶性肿瘤中的作用。
But it was not clear what test was used; only blood tests for antibodies would show whether pigs had the virus in February, when the human outbreak is thought to have begun.
但是还不太清楚的是什么检测被使用了；二月的时候，仅有关于抗体的血检验会显示猪是否携带病毒，当人类流感被认为在已经爆发时。
It is clear that the movement and trade of poultry is making a big contribution to the spread of the virus (see article).
显而易见，家禽的流动和交易对禽流感病毒的播散起到了很大作用。
It is not clear if this is due to genetic changes in the virus, however, or to other factors like the weather.
然而，目前尚不清楚的是，造成此现象的原因是病毒的基因变化还是天气等因素。
Experts say it is impossible to know yet whether swine flu is the trigger for a pandemic - but within 72 hours it should become clear how far the virus has spread.
专家说，现在不可能知道猪流感是否是疫情蔓延的开始，在72小时内，人们会很清楚病毒已经蔓延到了哪里。
It is not clear if Blair or any of their 4 children also have the virus.
目前尚不清楚布莱尔以及他们的4个孩子是否感染了流感。
But, regardless of how we got here, the clear and present danger that the virus in the housing, mortgage and credit markets is infecting the overall economy is too great to ignore.
不过，暂且不论我们怎么走到了这步田地，眼下在住房、抵押贷款和信贷市场的问题已给整个经济领域带来了侵袭，这种显而易见的危险是无法被忽视的。
The clinical significance of a particular NAI-resistant isolate from a patient is often not clear but virus viability and transmissibility are clearly important characteristics.
从患者中分离出某种特定的NAI耐药株，其临床意义还不清楚，但病毒的生存力以及传染性无疑是重要的特征。
Authorities say tests showed 800 ducks in the Mekong delta province of Vinh Long were infected with bird flu, but it is not immediately clear if they had the H5N1 strain of the virus.
有关当局说，检测结果显示，湄公河三角洲地区的永隆省有800只鸭子感染了禽流感病毒，但是目前还不清楚，它们感染的是不是h5n1型病毒。
It is not yet clear whether their deaths are directly linked to their virus or pre-existing conditions.
目前还不清楚他们的死亡是直接由于他们的病毒还是与他们生前健康状况有关。
His virus-avoiding strategy (besides steering clear of those who are sick and being vigilant about hand washing) includes loading up on quercetin-rich foods.
他建议的抗感冒病毒策略除了远离传染源和勤洗手以外，就是要多吃富含槲皮素的食物。
It's not yet clear how vulnerable cats, dogs and other household animals may be to the new virus, but the Iowa cat's case reinforces just how different H1N1 is from the seasonal flu viruses.
现在还尚不明确猫，狗等其他家养宠物对新病毒的易感性，但是爱荷华的猫咪病例证实了H1N1与季节性流感有何不同。
This is a new virus, the United States has confirmed its danger and antivirus software can not clear it.
这是一个新的病毒，美国已经确认了它的危险性，而杀毒软体不能清除它。
Alternatively, when people have a diverse quasispecies, it may be a sign of a stronger immune response and that person may be able to clear the virus more readily.
另外，当患者有不同的准种，它可能提示免疫反应更强，患者清除病毒的可能性也更大。
Usually when viruses infect cells, the host immune system can fight to eventually clear the virus.
通常当病毒感染细胞的时候，宿主的免疫系统能够抵御并最终消灭病毒。
It is clear that the movement and trade of poultry is making a big contribution to the spread of the virus.
显而易见，家禽的流动和交易对禽流感病毒的播散起到了很大作用。
On the other side, they regulate the immune system to inhibit viral replication, resistance to virus infection and clear the infected cells.
另一方面联动机体固有免疫和获得性免疫应答，抑制病毒复制，抗病毒感染，清除被病毒感染的细胞。
Background & Aims: Broadly reactive neutralizing antibodies (nAbs) and multispecific T-cell responses are generated during chronic hepatitis C virus (HCV) infection and yet fail to clear the virus.
背景和目的：慢性HCV感染过程中能够产生广泛的中和性抗体（nAbs）和多特异性的T细胞反应，但仍然不能够清除病毒。
It is clear that in all these areas there is still much more to learn about this fascinating virus.
很清楚在所有这些地区更多仍然有获悉这种迷人的病毒。
The United States has recognized the danger of it, and the anti-virus software can not clear it.
美国已经确认了它的危险性，而杀毒软体不能清除它。
The United States has recognized the danger of it, and the anti-virus software can not clear it.
美国已经确认了它的危险性，而杀毒软体不能清除它。
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