Other heart doctors say heart disease prevention is important but not necessarily with pills.

其他的心脏科医生认为，心脏病的预防很重要，但不一定要用药物。

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But people infected with TB bacilli will not necessarily become sick with the disease.

但是，感染结核杆菌的人不一定患病。

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Regulatory uncertainties are not necessarily a cause for alarm, points out mark Benedict, an entomologist at the centers for disease control and prevention.

美国疾病防制中心的昆虫学者贝尼狄克特指出，法规的不确定性并不一定会引起担忧。

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Other heart doctors say heart disease prevention is important but not necessarily with pills.

VOA: special.2009.04.08

However, Simon Cousens, an epidemiologist at the London School of Hygiene and Tropical Medicine, points out that such a pattern does not necessarily mean a disease outbreak is levelling off.

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It is not necessarily a precursor to Alzheimer's disease, but it does raise the risk of progressing into that more severe illness.

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Even if a strong association between silicone and a disease is found, it does not necessarily establish causation.

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