跟读练习: VOA Learning English - Health Report # 397 - 通过YouTube学习英语口语
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This is the VOA Special English Health Report.
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This is the VOA Special English Health Report.
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Cardiovascular disease is the world's leading cause of death.
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It includes heart attack, stroke, and high blood pressure.
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Over the years, researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers.
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These are used to measure the presence and development of cardiovascular disease.
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Researchers have increasingly tried to use these biomarkers to identify people who are at high risk of developing heart disease.
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But a new study has found that they offer little help in this way.
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A team from Massachusetts General Hospital and Sweden's Lund University studied how effective the biomarkers are as predictors.
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Thomas Wang at the Mass General Heart Center was the senior was the senior author of the study.
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Dr. Wang said that even after measuring those additional biomarkers,
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they were not able to fully understand who was more likely to develop heart disease.
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Dr. Wang says they did identify some combinations of biomarkers that improved predictions of heart disease heart attacks and strokes.
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He said it is possible that in certain patients,
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measuring these biomarkers would be helpful.
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But for the majority of patients,
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having the information of the biomarker probably would not make a difference.
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Dr. Wang hopes future research will discover biomarkers that are better able to predict the risk of cardiovascular disease.
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But for now, he says,
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doctors should depend on traditional risk factors.
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These include a history of high blood pressure,
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high cholesterol, tobacco use, diabetes,
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obesity, physical inactivity, or poor nutrition.
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A separate study found no support for a theory that a biomarker called C-reactive protein causes heart disease.
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Earlier research suggested that the more of the protein in people's blood,
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the more likely they are to develop heart disease.
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The new study confirmed a link,
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but did not find evidence that the C-reactive protein causes the disease.
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Both studies appeared in the Journal of the American Medical Association.
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The World Health Organization estimates that cardiovascular disease killed 17 and a half million people in 2005.
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That was 30 percent of all deaths.
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Eight out of ten deaths were in low and middle income countries.
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At current growth rates, the WHO expects the number to reach 20 million by 2015.
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And that's the VOA Special English Health Report.
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为何要通过这段视频练习口语？
通过观看并模仿此视频中的内容，您可以在健康报告的专业背景下提升您的英语口语技能。这种“shadow speak”练习不仅帮助您提高发音和流利度，还能够加深对医学英语词汇的理解。掌握这些用语后，您能在学术讨论或医疗对话中更加自信，更容易与专业领域的英语使用者沟通。此外，通过重复练习，您将增强记忆力和口语表达能力，因此它非常适合那些准备雅思口语考试的学习者。
语法与表达在语境中的应用
视频中使用了一些关键的语法结构和表达方式，以下是一些您可以关注的例子：
- "is the world's leading cause of death" - 使用当前时态描述普遍真理。
- "Researchers have identified several substances" - 现在完成时展现过去的动作对现在的影响。
- "it is possible that..." - 用于表达推测和可能性，这在学术讨论中非常常见。
- "Doctors should depend on traditional risk factors" - 使用情态动词“should”来提出建议。
通过分析这些结构，您可以在进行雅思口语练习时更有效地构建自己的答案，使表达更加流畅和自信。
常见发音陷阱
在这段视频中，有一些单词和短语容易造成发音问题，特别是对于非母语者。例如：
- cardiovascular - 这个词较长且有多个音节，务必注意音节划分，清晰发音。
- biomarkers - 强调“bio”的部分，注意浊音的发音。
- cholesterol - 注意“chol”音的发音；某些地区的方言可能会使这个词变化。
在进行英语口语练习时，您不妨反复练习这些词汇的发音，以确保在真实对话中能够流畅自如地交流。同时，您可以通过“shadow speech”的方法，将这些发音模仿得更加精准。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。