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| 51. | 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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| 52. | It later became apparent that rabbits were developing a degree of resistance to this disease. |
| 后来，兔子显然对这种疾病产生了一定的免疫力。 |
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| 53. | not increasing as the amount taxed increases. |
| 不随数量的增加而增加。 |
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| 54. | 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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| 55. | The act or process of multiplying or the condition of being multiplied. |
| 增加增加的行为或过程或者被增加的情况 |
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| 56. | 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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| 57. | 在加大对农林水利，铁路，公路，通信，环保，城市基础建设投入的同时，增加对粮库，农村电网，城市经济适用住房和生态环境建设的投资。 |
| While increasing investment in farming, forestry, water conservancy, railways, highways, telecommunications, environmental protection and urban infrastructure, additional funds were made available for construction of grain depots, rural power grid, urban economic housing, and the environment. |
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| 58. | "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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| 59. | 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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| 60. | There is a increase in heat radiation with a increase in load, and there is a decrease with an increase in speed. |
| 负荷增加时辐射热量增加,转速增加时辐射热量减少。 |
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