跟讀練習: How Caffeine Works - 通過影片學習英語口語

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13 句

如果句子過短或過長，請點選 Edit 進行調整。

This is your brain on caffeine.

It's the world's most popular psychoactive drug, lifting fatigue and helping you focus on daily tasks. But how?

Caffeine molecules are a similar shape to adenosine, which builds up while you're awake and tells your brain to sleep.

By blocking adenosine receptors, caffeine keeps you alert.

It also tightens blood vessels and speeds up your breathing by stimulating your respiratory center,

all while promoting the release of neurotransmitters that boost your mood and improve attention.

But these benefits stop paying out at higher doses.

Drinking more will keep improving your reaction times and keep you awake, but at some point your accuracy stops getting better and starts to get worse.

Although caffeine temporarily blocks adenosine receptors, adenosine continues to build up.

Once caffeine's effect wears off, it bounces back, making you need more just to keep yourself awake.

Over time, higher doses are more likely to make you anxious, sleep worse, and can even trigger issues like irregular heartbeats.

Luckily, caffeine withdrawal is normally short and mild, so if it makes you anxious or jittery, try tapering off or just cutting it out.

For most people, low doses are the sweet spot.

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AI 發音評分逐句打分

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詞彙遊戲邊玩邊學

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本課的詞彙與口語要點

這節口語課以影片“How Caffeine Works”為素材。影片中反覆出現的詞有：caffeine, adenosine, doses, awake。這段影片共有 13 個句子、198 個單詞可供跟讀。講話部分時長為 1:11。說話人語速自然，每分鐘約 167 個詞，接近日常對話。只有 73% 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 15 個值得學習的單詞，附發音和釋義：

單詞	發音	釋義
caffeine 名詞	/ˈkæfiːn/	咖啡因, 咖啡鹼 /咖啡鹼
dose 名詞	/ˈdəʊ̯s/	劑量 /劑量, (一)劑 /劑
awake 動詞	/əˈweɪk/	醒, 醒來 /醒來
anxious 形容詞	/ˈæŋkʃəs/	緊張 /緊張
receptor 名詞	/ɹɪˈsɛp.tə/	受體 /受體
mood 名詞	/muːd/	心情, 情緒 /情緒
alert 形容詞	/əˈlɝt/	警惕
vessel 名詞	/ˈvɛsəl/	船隻 /船隻, 船
breathe 動詞	/bɹiːð/	呼吸, 吸
trigger 名詞	/ˈtɹɪɡɚ/	扳機 /扳機
accuracy 名詞	/ˈæk.jɚ.ə.si/	準確度 /準確度, 準確性 /準確性
mild 形容詞	/ˈmaɪld/	溫和的, 溫和的
temporarily 副詞	/ˌtɛmpəˈɹɛɹəli/	暫時地 /暫時地, 臨時地 /臨時地
withdrawal 名詞	/wɪðˈdɹɔ(ə)l/	退出, 撤退
luckily 副詞	/ˈlʌk.ɪ.li/	好在, 所幸

影片中出現的短語動詞

單詞	發音	釋義
speed up 動詞	/spiːdˈʌp/	加速, 加快

需要注意的發音

“th” 音: breathe /bɹiːð/, withdrawal /wɪðˈdɹɔ(ə)l/
長單詞——注意重音位置: accuracy /ˈæk.jɚ.ə.si/, temporarily /ˌtɛmpəˈɹɛɹəli/, respiratory /ɹɪˈspɪ.ɹət.ə.ɹi/, irregular /ɪˈɹɛɡ.jə.lɚ/, adenosine /əˈdɛnəˌsin/

中文母語者容易讀錯的音：

/v/ — 不要讀成 /w/，上齒輕觸下唇: vessel /ˈvɛsəl/, psychoactive /ˌsaɪkoʊˈæktɪv/
詞尾子音 — 要讀清楚，後面不要加母音: dose /ˈdəʊ̯s/, awake /əˈweɪk/, anxious /ˈæŋkʃəs/, mood /muːd/, boost /buːst/
/r/ 和 /l/ 的區別: temporarily /ˌtɛmpəˈɹɛɹəli/, withdrawal /wɪðˈdɹɔ(ə)l/, irregular /ɪˈɹɛɡ.jə.lɚ/

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 caffeine, dose, awake 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 Caffeine Works - 通過影片學習英語口語

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