シャドーイング練習: Sharks 101 | National Geographic - YouTubeで英語スピーキングを学ぶ
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(ominous music) - [Narrator] They glide through the water with unmistakable grace, remnants of an ancient past, they dive and they rise from the ocean's murky depths to it's sun-kissed shallows, rousing fear and awe like no other creature in the sea.
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(ominous music) - [Narrator] They glide through the water with unmistakable grace, remnants of an ancient past, they dive and they rise from the ocean's murky depths to it's sun-kissed shallows, rousing fear and awe like no other creature in the sea.
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The world's biggest living fish is a shark.
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Of the estimated 34,000 species of fish, the largest are whale sharks.
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These gentle giants usually grow to about 40 feet long and weigh an estimated 15 tons.
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Their mouths alone can span four feet wide.
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The gigantic whale shark however, pales in comparison to the largest fish that ever existed, the megalodon.
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Dating to over 20 million years ago, it's thought that the prehistoric shark could of reached 80 feet long, weighing up to around 70 tons.
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Unlike whale sharks, the megalodon was carnivorous, and consumed any creature that fit into it's nearly 10 foot wide mouth.
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Throughout their lives some species of shark can shed over 30,000 teeth.
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Unlike humans who are born with a set number of teeth in their jaws, sharks have a seemingly limitless supply.
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They can grow, lose, and replace their teeth as needed.
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Furthermore, most sharks have multiple rows of teeth in their jaws.
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The jaws of a great white shark, the largest predatory fish in the sea, can contain up to seven rows that hold up to 300 teeth at any one point.
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Most sharks, as they hunt their prey, end up losing their teeth individually.
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However, the cookiecutter shark loses and replaces the teeth in it's lower jaw all at once.
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Sharks are built for speed.
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The fastest known shark, the mako shark, can reach speeds of up to 46 miles per hour.
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This speed is largely due to their body's hydrodynamic design.
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Many sharks have torpedo shaped heads that allow them to cut through the water with little resistance.
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Plus, shark skin is covered with flat, v-shaped scales, called dermal denticles.
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The denticles help water flow smoothly over the skin, which reduces friction and helps sharks swim quickly and quietly.
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Sharks also have skeletons made of cartilage instead of bone.
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Cartilage is a much lighter material than bone so sharks have less weight to carry.
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Sharks may lay eggs, or bear live young.
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Egg laying sharks only lay a few large eggs.
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They may come in various forms, such as sacks called mermaid purses or corkscrews.
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These eggs act as external wombs in which shark embryos complete their development.
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However, most sharks give birth to live young.
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Called pups, the young of most live bearing species gestate for around one year.
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Some even begin practicing their predation skills while in the womb.
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Before they are born, the sand tiger shark pups compete with their siblings.
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In fact, the strongest pup in each of the two wombs devours its weaker brothers and sister.
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Some sharks are at risk of extinction.
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Every year an estimated 100 million sharks are killed worldwide, in large part for the shark fin trade.
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The sharks are caught and their dorsal fins are removed and sold at a hefty price, primarily in Asia.
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In traditional Chinese culture, serving and eating shark fin is a sign of status and wealth.
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Because of the high demand and value of shark fins, some shark populations have plummeted by up to 70% causing a ripple effect in ecosystems and endangering at least 74 shark species.
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However, measures are being taken to protect sharks with a number of countries and jurisdictions cracking down on unsustainable shark fishing.
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In China, shark fin soup is no longer allowed to be served at government banquets.
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A move hailed by shark conservationists.
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Through continued international conservation efforts, the loss of sharks may be curbed, allowing the creatures in all their power and grace to survive for many generations to come.
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この動画では、サメの世界についての深い知識が紹介されています。ナレーターは、サメの優雅さや古代からの生き残りとしての特徴を強調し、驚異的な生態や生存のための適応能力について説明しています。これにより、サメがどのように進化してきたかを学ぶことができ、視聴者にとって知られざる側面が浮き彫りになります。
日常会話のためのトップ5フレーズ
- “They glide through the water with unmistakable grace.” - 水中を独特の優雅さで滑る。
- “The world’s biggest living fish is a shark.” - 世界最大の生きている魚はサメです。
- “Some species of shark can shed over 30,000 teeth.” - サメのいくつかの種は3万本以上の歯を失うことができます。
- “Sharks are built for speed.” - サメは速さを考慮して作られています。
- “Every year an estimated 100 million sharks are killed worldwide.” - 毎年、全世界で推定1億匹のサメが殺されています。
ステップバイステップ シャドーイングガイド
この動画を使った英語シャドーイングの練習は、あなたの英語スピーキング練習に大いに役立ちます。以下のステップに従ってください：
- 視聴: まず動画を全体的に見て、内容を理解します。サメについての基本的な知識を得ることで、後の学習がスムーズになります。
- リスニング: 難易度の高い部分を再度何度も聞き返します。特に、サメの種類や特徴についての説明部分に注目しましょう。
- シャドーイング: ナレーターの言葉を繰り返すことで、YouTubeで英語学習を進めます。音声を一時停止して、自分の発音を確認しながら練習します。
- 発音練習: 特に難しかったフレーズや単語を抜き出し、何度も声に出して練習します。語彙を増やし、IELTS スピーキング対策にも利用しましょう。
- 振り返り: 最後に、動画を再度見直し、理解が深まったかを確認します。自分の進捗を記録して、今後の学習に役立てましょう。
この方法を使えば、サメの世界を学びながら英語スピーキング練習を効果的に行えます。楽しんで学び、スキルを向上させてください！
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。