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| 1. | Paragangliomas of head and neck are rare tumors that occur sporadically with the prevalence of about1 |
| 摘要头颈部副神经节瘤是一罕见偶发的疾病，盛行率约占所有头颈部肿瘤的三万分之一。 |
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| 2. | Three theories contain the function with prevalence. |
| 这三论都包含一定的优 收稿日期:2002—03—04; |
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| 3. | Among various regions of the world, it is south Asia which is hit hardest with prevalence reaching 80% |
| 在世界各地区中，南亚受打击最重，在一些国家中流行程度达80%。 |
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| 4. | smuggling and trafficking of precursor chemicals and of ephedrine have increased rapidly in tandem with |
| 八十年代以来，随着世界毒品问题的泛滥和化学合成毒品生产的扩张，跨国走私、贩运各种易制毒化学品和麻黄素活动剧增。 |
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| 5. | Mainly women of reproductive age and children under five are affected by iron deficiency, with prevalence |
| 铁缺乏主要影响育龄妇女和5岁以下儿童，在发展中国家此病发病率约为50%左右。 |
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| 6. | Results Out of910 children,495 had evidence of regurgitation in one or more valves, with a prevalence |
| 瓣膜返流用脉冲、续及彩色多普勒技术在心脏多个切面探查并分级。 |
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| 7. | Mucoepidermoid carcinoma of the larynx is rare, with reported prevalence varying from0.08% to0.5%. |
| 摘要黏液类上皮癌约占所有唾液腺肿瘤之3%20%其中60~0%长于腮腺，另15~0%长于口腔，特别是软颚及齿龈。 |
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| 8. | Compared with 1991, the prevalence of hypertension increased by 31% with more than 70 million new hypertension |
| 与1991年相比，患病率上升31%，患病人数增加约7 000多万人。 |
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| 9. | It has to do with the prevalence and features of a disease in a population. |
| 它研究人群中疾病的流行和特征。 |
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| 10. | However, with the prevalence of Internet/Intranet technology, the institutional framework of educational |
| 不过，随着Internet／Intranet技术的流行，教育管理的组织结构呈现出多元化、分布化和网络化的趋势，教育管理信息系统也随之要适应这种分布式计算环境的要求。 |
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