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| 51. | Immunity in this sense can be acquired "actively" by direct exposure of the subject to an infectious organism. |
| 从这个意义上说，免疫力可以通过直接暴露于感染源而“主动”获得。 |
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| 52. | a mixture of toxin and antitoxin used to immunize against a disease. |
| 用来提高抵抗疾病的免疫力的毒素和抗毒素的混合物。 |
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| 53. | The ability to respond immunologically to bacteria, viruses, or other antigenic agents. |
| 免疫力对细菌、病毒或其它抗生药的免疫反应能力 |
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| 54. | Immunity ABility to resist attack or overcome infection by invading microbes or larger parasites. |
| 免疫力: 抵抗入侵微生物或较大寄生虫攻击或克服感染的能力。 |
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| 55. | These irradiations may cause the leukopenia, reduce the human body immunity. |
| (4)这些射线会使白血球减少，降低人体的抵抗力和免疫力。 |
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| 56. | "Said he'd be coming for sure, and you weren't to take any customers .... |
| “他说一定要来，一定莫留客，…… |
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| 57. | "Some diseases, such as whooping cough and chicken pox, usually leave a child immune, or protected, for the rest of his life." |
| 某些疾病，如像百日咳和水痘，通常让孩子产生终生免疫力。 |
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| 58. | They may cause psychological and physiological imbalance, and decline of memory and immunity. |
| 这些现象很可能使人的心理、理失衡，记忆力、体免疫力下降。 |
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| 59. | immunity to a particular disease that is not innate but has been acquired during life; immunity can be acquired by the development of antibodies after an attack of an infectious disease or by a pregnant mother passing antibodies through the placenta to a fetus or by vaccination. |
| 不是天生的而是后天获得的对某一疾病的免疫力。 |
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| 60. | "Some plants have relative immunity to a great many diseases, while others have a susceptibility to them. " |
| 对于许多病害，有的作物具有免疫力，而另一些作物容易受到感染。 |
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