シャドーイング練習: The Mosquito Like You've Never Seen It – 3D Animation - 動画で英語スピーキングを学ぶ
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This is a mosquito, but not as you've ever seen one before.
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If one bites you tonight, more happens inside your body in the next 30 seconds than you might imagine.
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Six different needles slide beneath your skin.
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A tiny pump inside its head draws up your blood.
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A gland injects a cocktail of active substances into you.
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And your own immune system goes on high alert.
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Mosquitoes kill more than 700,000 people every year.
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More than snakes, rabid dogs, crocodiles, sharks and hippos combined.
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Even tiny freshwater snails and assassin bugs are deadlier than any large predator.
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But none of them comes close to the mosquito.
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More people die because of mosquitoes than we kill each other.
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The footage you're about to see does not exist anywhere else in quite this way.
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because no microscope can show all of these structures at once.
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What you'll see over the next few minutes are the 30 seconds of a single bite.
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From the moment the mosquito detects you from several meters away
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to what your immune cells do beneath your skin just seconds later.
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And at the very end, I'll show you one trick that can almost completely shut down the itch
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and why most people do exactly the wrong thing when they get bitten.
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But before it can bite you, it first has to find you.
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And to do that, it uses an astonishing sensory system.
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You're sitting outside on the patio in the evening.
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How does a mosquito know, from 10, 20, sometimes even 50 meters away, that you are there, and not the dog sitting next to you?
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The answer is strange.
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It doesn't see you.
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At the moment it tracks you down, it is almost blind.
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What it does have is a system of smell and heat sensors so precise
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that it puts even modern drone technology to shame.
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It finds you in three stages.
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First, you breathe out.
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Every breath you exhale is a cloud of carbon dioxide.
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Mosquitoes have highly specialized receptors on their antennae
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that can detect this CO2 trail from dozens of meters away under the right conditions.
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It flies in a zigzag pattern through the cloud until it gets closer.
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Second, heat.
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Once it gets to within about one meter of you, its infrared receptors switch on.
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It senses the warmth of your skin before it has even touched you, allowing it to distinguish warm-blooded animals from the cooler surroundings.
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3. Smell At close range, it comes down to the way you smell.
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Lactic acid in your sweat, the bacteria living on your skin, your personal microbiome.
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Some people simply smell better to mosquitoes than others.
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So it has found you.
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It has landed.
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But now comes the part almost nobody knows.
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A mosquito does not use one needle to bite you.
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It uses six.
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What we all call a mosquito's proboscis is not actually a single tool.
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It is a bundle of six different structures, each with a very specific job.
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What we see from the outside is only the protective sheath.
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It is called the labium.
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When the mosquito bites, this sheath bends away to the side, like a rail opening up, and releases six ultra-fine stylets that actually penetrate your skin.
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Two of them are the mandibles.
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Their only job is to hold your tissue apart.
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Two more are the maxillae.
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They have tiny, sore-like teeth along their tips.
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With them, the mosquito cuts its way through your skin, but so finely that the nerve endings in your skin barely register the movement.
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One needle is the hypopharynx.
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This is its syringe.
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Through it, the mosquito pumps its saliva cocktail into you.
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More on that in a moment, because this is the real reason your bite starts itching later.
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The final needle is the labrum.
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This is its drinking straw, a hollow channel leading directly to its mouth, through which it draws your blood upward.
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The moment it hits a blood vessel, two tiny pumps inside its head begin working.
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The siberial pump and the pharyngeal pump.
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They pull your blood up through the feeding tube, down the esophagus and into the digestive tract.
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within just a few minutes a mosquito can take in a
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blood meal equivalent to roughly two to three times its own body weight inside the midgut
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that blood is processed immediately the proteins are used to build
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eggs up to around 300 from a single blood meal excess water is rapidly expelled through the malpighian tubules
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so the mosquito can still fly
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but before any of this can happen it has one problem to solve
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and its solution is the reason every mosquito bite you have ever had began to itch what
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if i told you
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that the itch does not come from the wound itself it
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comes from something the mosquito deliberately injects into you the mosquito has a problem
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if your blood clots as quickly as it normally does the capillary closes within seconds
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and it gets nothing to drink
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so evolution gave it a remarkably brutal solution on both sides of its head are salivary glands.
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They produce a chemical cocktail, which is pumped into you through the hypopharynx.
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First component, anticoagulants.
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They prevent your blood from clotting around the feeding tube.
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Second component, anaesthetics.
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These help keep you from noticing the bite in the first place.
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Third component, vasodilators.
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substances that widen your blood vessels.
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That allows more blood to flow toward the bite site.
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Three groups of active substances, more than 100 different proteins, all inside a single droplet of saliva, smaller than the head of a pin.
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And that saliva cocktail can also contain pathogens, malaria parasites, dengue viruses, Zika virus,
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West Nile virus, yellow fever and Japanese encephalitis.
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In some parts of the world, Every mosquito bite is a roll of the dice with your life.
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In 2024 alone, more than 14 million dengue cases were reported worldwide, the highest number ever documented.
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Brazil accounted for more than 10 million of them.
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India and Indonesia combined reported around 490,000.
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Malaria kills roughly 600,000 people every year, most of them in Africa.
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But the truly unsettling question is not where these diseases are today, it is where they are moving next.
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25 years ago, the Asian tiger mosquito was unknown in California.
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Today, it is established there.
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In 2024, the United States recorded more than 100 locally transmitted dengue cases, mainly in Florida, California and Texas.
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Mosquitoes are the deadliest animals on Earth, not because of the bite itself, but because of what they can carry inside that tiny drop of saliva.
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But if you do not live in the tropics, your main problem is usually something else.
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that maddening itchy red bump on your skin that can follow you around for days.
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And this is where the trick I promised comes in.
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Why does a mosquito bite itch at all?
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And why can it keep itching for three days?
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The answer is, honestly, almost ironic.
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It is not the bite.
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It is not the wound.
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It is not even the mosquito's saliva alone.
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It is your own body overreacting.
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The moment the mosquito injects its saliva, your immune system recognizes the saliva proteins as foreign.
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In your skin are cells called mast cells.
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Think of them as tiny alarm capsules packed with chemical messengers.
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When mast cells detect these foreign proteins, they release their contents, especially histamine.
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Histamine does two things.
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It widens your blood vessels so more immune cells can reach the bite site, and it irritates the nerve endings in your skin.
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That irritation is what you experience as itching. That is the paradox.
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The mosquito itself barely hurts you.
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It is your own body's reaction that drives you crazy for the next three days.
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And now for the trick.
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If you treat the bite briefly with controlled heat at around 50 degrees Celsius, for example with a BiteAway or a similar heat-based bite reliever,
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you may reduce the reaction that triggers the itch.
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Clinical studies have reported itch reductions of up to 80 or 90% within minutes.
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One important thing, it only works if you do it early, ideally within the first few minutes after the bite.
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If the histamine reaction is already fully underway, cooling the area or using an antihistamine cream may be more helpful.
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And the worst thing you can do is scratch.
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Scratching damages more skin cells, can intensify the inflammatory response and may lead to infection.
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If you really cannot resist, press a small cross into the bite with your fingernail instead.
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It can give temporary relief without breaking the skin.
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And if you want to stop mosquito bites before they happen, you really only need three things.
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DEET.
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Strong protection, lasting up to eight hours.
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But it can irritate the skin and damage some plastics.
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Picaridin.
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Almost as effective, but generally gentler on skin and materials.
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If you have the choice, pick this one.
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Light, loose-fitting clothing and a fan.
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Even a simple airflow can seriously disrupt mosquitoes.
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They struggle to fly against the wind, and the scent trail leading them to you gets blown apart.
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You have now seen how a mosquito finds you from several meters away.
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How it cuts into you with six tiny needles.
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What it injects into your body.
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And why your own immune system can torment you for days.
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30 seconds that we would normally never get to see.
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That is exactly what I do on this channel.
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I create 3D animations of animals we all know, but in a level of detail we have never seen before.
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How they are built, how they work.
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And I explain how certain drinks are made, and how technical devices function.
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I virtually cut them open and make them understandable for everyone.
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If you want to find out what gets cut open from the inside next, subscribe and turn on the bell.
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Thank you.
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このレッスンの語彙とスピーキングのポイント
このB2レベルのスピーキングレッスンは、動画「The Mosquito Like You've Never Seen It – 3D Animation」を教材にしています。 繰り返し出てくる語は次のとおりです：mosquito, bite, skin, blood, saliva。 この動画には、シャドーイング用の文が148文、単語が1643語あります。 音声の長さは10:32です。 話す速さは1分あたり約156語で、日常会話に近い自然なペースです。 英語の頻出3,000語に含まれる単語は77%だけなので、語彙は難しめです。
この動画の重要語彙
動画の中で特に難しい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| mosquito 名詞 | /məsˈki.toʊ/ | 蚊, カ |
| itch 名詞 | /ɪt͡ʃ/ | かゆみ |
| saliva 名詞 | /səˈlaɪvə/ | 唾, 唾液 |
| needle 名詞 | /ˈniː.dəl/ | 針 |
| cocktail 名詞 | /ˈkɑk.teɪl/ | カクテル |
| meter 名詞 | /ˈmitəɹ/ | メーター, 計量器 |
| dengue 名詞 | /ˈdɛŋ.ɡi/ | デング熱, デンゲ熱 |
| histamine 名詞 | /ˈhɪstəmiːn/ | ヒスタミン |
| detect 動詞 | /dɪˈtɛkt/ | 検出する, 見付ける |
| irritate 動詞 | /ˈɪɹ.ɪˌteɪt/ | いらいらさせる, 怒らせる |
| mast 名詞 | /mɑːst/ | マスト, 帆柱 |
| malaria 名詞 | /məˈlɛəɹi.ə/ | マラリア |
| scratch 動詞 | /skɹæt͡ʃ/ | 引っ掻く |
| nerve 名詞 | /nɝv/ | 神経 |
| airflow 名詞 | 気流 |
動画に出てくる句動詞
| 単語 | 意味 |
|---|---|
| draw up 動詞 | 練る |
| find out 動詞 | 見出す, 調べる |
| shut down 動詞 | シャットダウン |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | you've ever seen · has even touched · has found |
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | is called · is processed · is pumped |
注意したい発音
話し手はyou're, doesn't, I'llなど、短縮形や弱形を6回使っています。聞こえたとおりの短い形で発音しましょう。
- 「th」の音: sheath /ʃiθ/, pathogen /ˈpæθəd͡ʒn̩/, warmth /wɔɹmθ/
- 「sh」と「zh」の音: sheath /ʃiθ/, astonish /əˈstɑnɪʃ/, irritation /ˌɪɹ.ɪˈteɪ.ʃən/, specialize /ˈspɛʃəˌlaɪz/, freshwater /ˈfɹɛʃˌwɔːtə(ɹ)/
- 長い単語（アクセントの位置に注意）: malaria /məˈlɛəɹi.ə/, antihistamine /ˌæn.tiˈhɪs.tə.miːn/, capillary /ˈkæpəˌlɛri/, encephalitis /ɛnˌsɛfəˈlaɪtɪs/, intensify /ɪnˈtɛnsɪfaɪ/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: malaria /məˈlɛəɹi.ə/, capillary /ˈkæpəˌlɛri/, crocodile /ˈkɹɑkədaɪl/, droplet /ˈdɹɑplət/, labrum /ˈleɪ.bɹəm/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: saliva /səˈlaɪvə/, nerve /nɝv/, digestive /daɪˈdʒɛstɪv/, overreact /ˌoʊ.vəɹ.ɹiˈækt/, salivary /ˈsælɪˌvɛɹi/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: encephalitis /ɛnˌsɛfəˈlaɪtɪs/, fingernail /ˈfɪŋɡɚˌneɪl/, intensify /ɪnˈtɛnsɪfaɪ/, oesophagus /ɪˈsɑfəɡəs/, pharyngeal /ˌfɛɹ.ənˈd͡ʒi.əl/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
- 自分の声を録音して元の音声と比べます。mosquito, itch, salivaなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。