31. | Hunger and disease had weakened his constitution. |
| 他饥饿与疾病交加,体质已削弱。
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32. | Years of research work have failed to produce a cure for the disease . |
| 多年的研究工作未能找到医治这种疾病的疗法。
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33. | Whenhis lungs were X-rayed the disease could be clearly seen. |
| 对他的肺部进行了X射线检查,疾病一目了然。
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34. | As yet little is known of the causes of the disease . |
| 造成这种疾病的原因迄今几乎一无所知。
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35. | Scientists are in search of a cure for the disease . |
| 科学家想研究出治疗这种疾病的方法。
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36. | The symptoms of this disease are fever and sickness. |
| 这种病的症状是发烧与呕吐。
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37. | The disease is spreading fast. |
| 这种病正在迅速蔓延。
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38. | Flies spread disease . |
| 苍蝇能传播疾病。
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39. | Chest pains may be symptomatic of heart disease . |
| 胸痛可能是心脏病的症状。
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40. | Tension is a major cause of heart disease . |
| 精神紧张是引起心脏病的主要原因。
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