跟讀練習: How do vaccines work? - 通過影片學習英語口語

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26 句
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To understand how vaccines work, it helps to look first at how the immune system works, because vaccines harness the natural activity of your immune system.
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There are about a hundred trillion bacteria and viruses on your body.
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Not all of them cause disease.
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But some are able to get inside our bodies to multiply, and this can make us ill.
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There are barriers to stop this happening.
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But suppose some disease-causing bacteria do get through.
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Your immune system is quick to recognize them as invaders.
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This is because the proteins or sugars on the bacteria's surface have different shapes to any of the ones in the human body.
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They trigger a complex chain of events involving many different types of white blood cells working together.
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One type of white blood cell is able to make antibodies to fight the invaders.
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Antibodies can stick to the proteins or sugars on the bacteria's surface, and this kills the bacteria or disables them.
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However, not all antibodies will work against these bacteria.
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They have to be exactly the right shape, a bit like a key fitting a lock.
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Our bodies have a library of billions of white blood cells, each of which can make just one shape of antibody.
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Only a few of these antibodies will match the invading bacteria.
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Producing antibodies of the right shape can take several days.
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By this time there could be billions of disease-causing bacteria in your body.
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Once the right cells are activated they quickly divide and turn into a production line, making masses of antibodies that stick to the bacteria.
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Eventually your body gets rid of all the bacteria and you recover.
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Antibodies remain in the blood, and some white blood cells may also become memory cells.
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If those specific bacteria invade the body again, the immune system will respond so quickly that you won't get ill.
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Vaccines work in the same way.
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They contain weakened or dead bacteria or viruses, or even just a few proteins or sugars from the surface.
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This is enough to convince the immune system that a real invader has got in.
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The same process takes place as when real bacteria or viruses invade our bodies - except you don't get ill.
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Afterwards, if your body ever meets the real thing, your immune system will remember it and get rid of it before you even know it's there.

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推薦影片

你能學到什麼

這段影片不僅能幫你瞭解疫苗的工作原理,還能提升雅思口語練習中的兩個關鍵能力:一是用清晰的邏輯解釋科學概念(比如如何分步說明免疫系統與疫苗的互動),二是在描述複雜過程時使用連貫的連線詞(如“然而”“一旦”“之後”)。此外,通過模仿影片中的表達,你還能學會用更自然的方式講述科普類話題,這對口語考試中的學術討論場景非常有幫助。

注意這些發音現象

影片中存在不少連讀和弱讀現象,比如“hundred trillion”中的[d]和[t]連讀成[dr],“able to”弱讀為[əbl tə],“it helps to”中的“helps to”連讀成[helptə]。還有“trigger a complex”中的“a”弱讀為[ə],以及“memory cells”中的“memory”尾音[y]與“cells”開頭的[c]連讀。這些發音細節能讓你的口語聽起來更像母語者,在shadow speech練習時要特別注意。

像母語者一樣表達

想要模仿影片中的節奏和重音,關鍵是抓住句子的核心資訊。比如“Vaccines work in the same way.”中,“Vaccines”和“same way”需要重讀,突出疫苗的作用機制與免疫系統的相似性。再比如“Once the right cells are activated they quickly divide...”中,“Once”“right cells”“quickly divide”是重音所在,強調過程的先後順序。練習時可以用shadow speak的方法,逐句跟讀並記錄重音位置,逐漸掌握這種抑揚頓挫的節奏。長期堅持,你的口語流暢度和自然度會有明顯提升,無論是雅思考試還是日常交流都能更自信。

什麼是跟讀法?

跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧,最初開發用於專業口譯員的培訓,並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大:您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同,跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性,語調,節奏,連讀,聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。

影子跟讀法: 閱讀完整分步指南 →