病毒的

• Healthy, skin, mucous membranes, and cilia are natural barriers to many viruses .
  健康的皮肤，粘膜和纤毛是许多病毒的天然屏障。
• The infectivity and other properties of viruses can be assayed by several methods .
  病毒的传染性及其它性质可通过几种方法鉴定。
• They lack a dormant form and their genomes are much smaller than those of viruses .
  它们没有休眠的形式，它们的基因比病毒的小得多。
• The capsid architecture is an important feature to consider in the characterization of viruses .
  衣壳构造是考虑病毒的一个重要方面。
• Aphid count on plants in fields do not correlate with virus spread in the same fields .
  田间植株蚜数与同块田内病毒的扩散程度间无相关性。
• This finding was used to develop a two-step concentration procedure for virus in tap water .
  这种现象被发展成为对自来水中病毒的两步浓缩方案。
• This shows that the rigors of space flight can reduce the infectivity of some viruses .
  这表明在苛刻的空间飞行条件下，能减少某些病毒的感染力。
• For example, fragments resembling dna from cancer-causing viruses might be removed and destroyed .
  例如，可能除掉或破坏类似来源于致癌病毒的DNA片段。
• Each type evokes antibodies which protect against the homologous, but not heterologous virus .
  每一种抗原型都能产生抗同种病毒的抗体，但对异种病毒则不能。
• A unified scheme has been developed for virus concentration from tapwater, seawater, and sewage .
  已经研究了一种可以从自来水、海水和污水中浓缩病毒的统一程序。