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| 11. | bacterium or virus, or of a portion of the pathogen's structure that upon administration stimulates antibody |
| 疫苗，菌苗削弱的或被杀死的病原菌的标本，如细菌或病毒，或病原菌结构的一部分，在配药时可产生对这种病原体的抗体同时又不可能引起严重传染 |
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| 12. | The guinea pigs develops antibody to fight against the sperm. This prevents pregnancy." |
| 当疫苗注射给豚鼠时，这种动物的自然防御系统把这种蛋白作为外来入侵者识别出来。豚鼠产生抗体同精子对抗。这就阻止了受孕。 |
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| 13. | The antibody system works well against a number of disease-causing agents or pathogens— especially against |
| 这种抗体系统对于好些病原菌功效卓著，特别是许多存身于宿主细胞外的细菌。 |
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