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| 21. | determine the proportion of children in a large school system who come to school without breakfast, have |
| 例如，有一位教育督察想知道在一个庞大的学校系统中，不吃早饭就上学的学生、已经做过防感冒免疫的学生，或其他任何类型的学生占多大比例。 |
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| 22. | According to the research, those aged between 18 and 34 are three times more likely to have a cold or |
| 该调查表明，18岁至34岁之间的人患感冒或流感的几率为他们父辈的三倍。 |
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| 23. | If you have traveled to, or are resident in, an area known to have bird flu, and within10 days you develop |
| 如果您到过或正在某个存在禽流感的地区而且您在10天内有过诸如发热、嗽、喉发炎、吸困难或任何不明重病等症状，您应该去看医生。 |
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| 24. | Nearly four dozen people have died of avian flu in the country, over a quarter of the global total since |
| 在印尼已经有四十多人死于禽流感，而这个数字已经超过三年前那次流感爆发所造成的全球范围内死亡总人数的四分之一了。 |
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| 25. | Avian flu viruses have demonstrated an ability to evolve to easily infect humans by exchanging genes |
| 禽流感病毒可通过与人类基因交换进化，进而能够识别人类细胞受体，获得进入细胞通道，尤其是人类呼吸通道，最终呈现易感染人的能力。 |
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