| 1. | The two components of virus spread can be separated .
病毒的两种扩散方式可以分开。 |
| 2. | The recovery of embedded viruses remains to be demonstrated .
对被包埋病毒的回收仍留待证明。 |
| 3. | In some viruses the nucleocapsid is surrounded by an envelope .
某些病毒的核衣壳是由被膜所包绕。 |
| 4. | Spontaneous and induced mutation occur with animals viruses .
动物病毒的突变有自发突变和诱发突变。 |
| 5. | Further multiplication of the virus produced papules on the skin .
病毒的进一步增殖使皮肤发生丘疹。 |
| 6. | Hemagglutination of some viruses has a particular ph requirement .
某些病毒的血凝反应需要一定的PH值。 |
| 7. | The envelope is derived in most cases from the cytoplasmic membrane .
大多数病毒的囊膜取自宿主细胞膜。 |
| 8. | Each type evokes antibodies which protect against the homologous .
每一种类型都能产生抗同种病毒的抗体。 |
| 9. | The growth of certain viruses is masked by faster growing ones .
某些病毒的生长可以被生长更快的病毒所掩蔽。 |
| 10. | Viability of the virus appears very difficult to assess at the time of production .
在生产时，病毒的活力很难测定。 |
