跟读练习: What causes herpes, and how can you treat it? - Christine Johnston - 通过YouTube学习英语口语
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In the 1st century CE, Roman emperor Tiberius made an unprecedented decision: banning kissing at all public events.
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39 句
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In the 1st century CE, Roman emperor Tiberius made an unprecedented decision: banning kissing at all public events.
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This move was aimed at thwarting a puzzling outbreak, which many historians believe was an epidemic of oral herpes.
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Fast forward to today, and more than half the population is infected with herpes simplex virus, though as many as 90% of those infected don't actually know they have it.
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The term “herpesvirus” refers to a whole family of viruses.
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But what we typically call the condition of herpes is caused by two viruses in particular: herpes simplex 1 and 2, or HSV-1 and HSV-2.
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While similar, they tend to infect different parts of the body.
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HSV-1 is typically associated with oral herpes, which causes cold sores on the mouth.
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Genital herpes can be caused by either virus, though it’s more often caused by HSV-2.
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Other body parts, such as fingers and eyes, can also be infected by either virus.
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Regardless of location or type, HSV enters the body through microscopic breaks in the skin or mucous membranes, like the mouth and genitals.
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Once inside, viral proteins hijack the cellular machinery to replicate and spread.
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For many people, this initial infection won’t result in any symptoms.
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But for others, the virus causes enough damage that fluid-filled blisters develop and rupture, causing painful lesions.
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With more severe initial infections, the virus can enter the bloodstream and lead to fevers, muscle aches, and headaches.
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This viral onslaught alerts the immune system, which gets to work attempting to eliminate the HSV virus, just as it would when faced with other common viral pathogens.
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But what makes HSV particularly difficult to clear is that some virus hides itself away, evading detection by the immune system.
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You see, in addition to penetrating skin and mucosal cells, HSV also infiltrates nearby nerve cells in the skin.
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They then travel along the stretch of axons until they reach nerve clusters called ganglia.
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HSV-1 thrives in the trigeminal ganglia, located in the skull, and HSV-2 prefers the sacral ganglia near the base of the spinal cord.
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Here, the virus goes dormant, turning off its replication machinery, which helps it avoid attacks from the immune system.
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It doesn't cause any damage or disease symptoms, but it doesn't disappear either.
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While living in the ganglia, the virus can reawaken periodically, often triggered by sickness or stress, though the cause isn’t always clear.
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No matter the reason, the virus travels back down along the nerve, which may cause itching or tingling, often the first symptom of recurrence.
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Once back at the surface, the virus begins to replicate, potentially causing a new bout of symptoms.
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The frequency of these recurrences can vary and happen as often as monthly, or as infrequently as every few years.
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And when the infection is active and shedding from the skin or mucosa, it's possible to spread to others via direct contact.
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Yet since most infections are asymptomatic or only cause mild flare-ups, many people don’t know they have HSV.
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And herpes is surprisingly difficult to diagnose.
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Blood tests aren’t normally recommended as they’re often inaccurate and can’t reliably distinguish between a genital or oral HSV-1 infection.
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If you do have symptoms, the best way to get a clear diagnosis is to see a health care provider when a lesion is present.
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Aside from the pain caused by sores during a flare-up, for most people, herpes doesn’t lead to serious health problems.
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And there are treatments to improve symptoms: antiviral medications work by mimicking a component of viral DNA and inhibiting viral replication.
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These medications can also reduce the risk of transmission, in the case of HSV-2, by about 50%.
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Over time, symptoms and shedding usually decline as the body produces immunity against the virus.
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Though, there is always some risk of flare-ups and transmission.
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That’s why for decades, scientists have searched for treatments that can prevent or cure herpes.
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But the virus's unique ability to establish silent infections and evade the immune system has made progress difficult.
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Still, there’s hope.
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Breakthroughs in emerging technologies like gene editing and novel vaccines show promise in the fight against this stealthy virus.
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通过观看并跟随克里斯汀·约翰斯顿的视频，学习者不仅可以了解大约一半人群感染的单纯性疱疹及其治疗方式，还可以在真实的语境中实践英语口语。此视频展示了流畅的表达和专业的术语，通过模仿和重复，学习者可以有效地提高英语发音和口语能力。使用英语影子跟读（shadowspeak），可以帮助你在实际语境中提升自信心和流利度，尤其在雅思口语练习时，更是不可或缺的技巧。
语法和表达方式分析
- 使用过去时态：视频中频繁使用过去时来描述历史事件，例如“罗马皇帝提比略做出了前所未有的决定”。这一结构能够帮助学习者在叙述过去事件时更准确地使用时态。
- 条件句的运用：视频提到“如果你有症状，最好在病变出现时去看医生”。这种句型适用于许多日常对话，有助于学习者表达假设情况。
- 被动语态：视频中也有许多被动语态的用法，例如“病毒被免疫系统检测”。这种结构能够增强学习者在正式场合的表达能力，提高语言的多样性。
常见的发音陷阱
在该视频中，一些词汇的发音对非母语学习者来说可能比较困难。例如，“herpes”（疱疹）和“infected”（被感染的）常常困扰学习者。注意这些单词的重点音节，及其音调的变化。同时，模仿克里斯汀的说话速度和语调能够帮助你提高发音的准确性。通过英语影子跟读（shadowspeak），学习者能够有效提高英语发音，克服口语中的发音障碍，从而在雅思口语练习中表现得更加优秀。
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。