跟讀練習: How Radioactive Are Your Teeth? - 通過影片學習英語口語

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25 句

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How radioactive are your teeth?

In the 1950s, American dentists collecting baby teeth found that they were dangerously radioactive and levels were rising every year.

This is bad news.

Radioactive teeth means radioactive bones.

Where was all this radioactivity coming from?

Not from their neighborhood, but nuclear weapons testing thousands of miles away.

As tensions escalated in the Cold War, The United States and the Soviet Union designed increasingly powerful nuclear weapons, many of which were detonated on their own soil.

Nuclear fission produces dozens of nuclei, most of which are radioactive themselves.

Atmospheric tests at the Nevada test site carried radioactive debris east where it would fall out of the air onto pasture.

Cows would eat this grass, making their milk slightly radioactive.

When this milk is given to children, radioactive elements are built into bones and teeth, accumulate in the thyroid and are incorporated into every cell.

When a radioactive nucleus decays in the body, it spits out high-energy particles, which break chemical bonds in cells,

mutate DNA, and ultimately cause cancers like leukemia.

And there were lots of tests.

Altogether, over 2,000 nuclear weapons have been detonated, more than 500 of them above ground,

spreading the radioactive fallout of 545 megatons of explosions.

And there's no cleaning it up.

This fallout is everywhere in the environment, causing cancers and potentially killing as many or more than the attacks on Hiroshima and Nagasaki.

Ultimately, the discovery of radioactive teeth convinced the US and Soviet Union to sign the partial test ban treaty,

so the good news is that above-ground testing mostly stopped during the Cold War, and the dangerous radioactive nuclei are slowly decaying away.

But many of these nuclei have half-lives of decades to centuries, so even people born today, long after testing has stopped,

may be killed by the fallout from last century's tests.

While testing has mostly stopped, it could return unless the nuclear weapons states formally adopt a UN treaty to ban it.

You have a choice.

You can demand that the governments of the world ban nuclear testing and even nuclear weapons, or you can look in the mirror and ask yourself...

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本課的詞彙與口語要點

這節 C1 級別的口語課以影片“How Radioactive Are Your Teeth?”為素材。影片中反覆出現的詞有：radioactive, nuclear, teeth, testing, weapons。這段影片共有 25 個句子、359 個單詞可供跟讀。講話部分時長為 2:15。說話人語速自然，每分鐘約 160 個詞，接近日常對話。只有 79% 的單詞屬於英語最常用的 3,000 詞，詞彙難度較高。

影片中的重點詞彙

影片中最難的 15 個單詞，附發音和釋義：

單詞	發音	釋義
radioactive 形容詞	/ˌɹeɪdioʊˈæktɪv/	放射性
nucleus 名詞	/ˈnuː.kli.əs/	核心, 核
fallout 名詞	/ˈfɔlˌaʊt/	落下, 下降
detonate 動詞	/ˈdɛtəneɪt/	爆炸
accumulate 動詞	/əˈkjuːmjʊˌleɪt/	積累 /積累
dangerously 副詞		危險地 /危險地
escalate 動詞	/ˈɛs.kə.leɪt/	升級 /升級, 升高
fission 名詞	/ˈfɪʃən/	分裂
leukemia 名詞	/luːˈkiːmi.ə/	白血病, 血癌
megaton 名詞	/ˈmɛɡəˌtʌn/	兆噸 /兆噸
mutate 動詞	/ˈmju.teɪt/	變異 /變異
pasture 名詞	/ˈpæst͡ʃəɹ/	牧場 /牧場, 牧草地
radioactivity 名詞	/ˌreɪdɪəʊakˈtɪvɪti/	放射性
thyroid 形容詞	/ˈθaɪ.ɹɔɪd/	甲狀腺的 /甲狀腺的
spit 動詞	/spɪt/	吐痰, 吐

影片中的語法

說話人最常用的結構，並附上影片中的原話：

結構	影片中的用法
被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的	were detonated · is given · have been detonated
現在完成時 have/has + 過去分詞 — 過去發生但與現在仍有關聯的事	have been detonated · has stopped

需要注意的發音

“th” 音: thyroid /ˈθaɪ.ɹɔɪd/, altogether /ɔl.tuˈɡɛð.ɚ/
長單詞——注意重音位置: radioactive /ˌɹeɪdioʊˈæktɪv/, accumulate /əˈkjuːmjʊˌleɪt/, leukemia /luːˈkiːmi.ə/, radioactivity /ˌreɪdɪəʊakˈtɪvɪti/, atmospheric /ˌætməsˈfɛɹɪk/

如何用這段影片練習

先完整聽一遍影片，不要開口，記下不認識的單詞。
先用 0.75 倍速逐句跟讀，熟練之後再回到正常速度。
錄下自己的聲音並與原聲對比，特別注意 radioactive, nucleus, fallout 這類單詞。

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 →

跟讀練習: How Radioactive Are Your Teeth? - 通過影片學習英語口語

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