Pratique du Shadowing: [Song ngữ - TED Ed] Sóng thần hình thành như thế nào? - Apprendre l'anglais à l'oral avec la vidéo

Création de la leçon...
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In 479 BC, when Persian soldiers besieged the Greek city of Potidaea, The tide retreated much farther than usual,
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leaving a convenient invasion route.
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But this wasn't a stroke of luck.
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Before they had crossed halfway, the water returned in a wave higher than anyone had ever seen, drowning the attackers.
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The Potidaeans believed they had been saved by the wrath of Poseidon.
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But what really saved them was likely the same phenomenon that has destroyed countless others: a tsunami.
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Although tsunamis are commonly known as tidal waves, they're actually unrelated to the tidal activity caused by the gravitational forces of the Sun and Moon.
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In many ways, tsunamis are just larger versions of regular waves.
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They have a trough and a crest, and consist not of moving water, but the movement of energy through water.
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The difference is in where this energy comes from.
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For normal ocean waves, it comes from wind.
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Because this only affects the surface, the waves are limited in size and speed.
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But tsunamis are caused by energy originating underwater, from a volcanic eruption, a submarine landslide, or most commonly, an earthquake on the ocean floor,
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caused when the tectonic plates of the Earth's surface slip, releasing a massive amount of energy into the water.
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This energy travels up to the surface, displacing water and raising it above the normal sea level.
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but gravity pulls it back down, which makes the energy ripple outwards horizontally.
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Thus, the tsunami is born, moving at over 500 miles per hour.
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When it's far from shore, a tsunami can be barely detectable, since it moves through the entire depth of the water.
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But when it reaches shallow water, something called wave shoaling occurs.
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Because there is less water to move through, this still massive amount of energy is compressed.
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The wave's speed slows down while its height rises to as much as 100 feet.
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The word tsunami, Japanese for harbor wave, comes from the fact that it only seems to appear near the coast.
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If the trough of a tsunami reaches shore first, the water will withdraw farther than normal before the wave hits, which can be misleadingly dangerous.
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A tsunami will not only drown people near the coast, but level buildings and trees for a mile inland or more, especially in low -lying areas.
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As if that weren't enough, the water then retreats, dragging with it the newly created debris, and anything, or anyone, unfortunate enough to be caught in its path.
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The 2004 Indian Ocean tsunami was one of the deadliest natural disasters in history, killing over 200 ,000 people throughout South Asia.
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So how can we protect ourselves against this destructive force of nature?
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People in some areas have attempted to stop tsunamis with sea walls, floodgates, and channels to divert the water.
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But these are not always effective.
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In 2011, a tsunami surpassed the flood wall protecting Japan's Fukushima power plant.
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causing a nuclear disaster in addition to claiming over 18 ,000 lives.
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Many scientists and policy makers are instead focusing on early detection, monitoring underwater pressure and seismic activity,
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and establishing global communication networks for quickly distributing alerts.
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When nature is too powerful to stop, the safest course is to get out of its way.

Why practice speaking with this video?

The TED Ed video on the formation of tsunamis provides an engaging context for practicing your English speaking skills. By exploring the scientific explanations and historical anecdotes presented in the video, learners can enhance their vocabulary and comprehension of complex topics. Using such content to learn English with YouTube allows you to immerse yourself in authentic language use, which is vital for developing fluency. The video presents real-world scenarios that prompt discussions about nature and safety, giving you the chance to practice speaking about critical issues that affect communities globally. Engaging with this material also helps to build confidence in articulating thoughts on challenging subject matter.

Grammar & Expressions in Context

In the video, several important grammatical structures and expressions emerge, enhancing your understanding as you practice speaking. Here are a few noteworthy examples:

  • “The energy travels up to the surface”: This simple present tense construction emphasizes ongoing actions, ideal for describing processes.
  • “When the water reaches shallow water”: The use of conditional clauses (when/if) is effective for explaining cause and effect, a crucial skill for articulating thoughts in English.
  • “It can be barely detectable”: Phrasing using modals (can, may, might) helps express possibility, important for nuanced conversations.
  • “People in some areas have attempted”: The present perfect tense illustrates actions that have relevance to the present, enabling you to connect past actions to current realities.

These structures provide an excellent framework for the shadowing technique, where you can repeat after the speaker to strengthen your grammar and fluency.

Common Pronunciation Traps

When practicing with the video, be aware of certain pronunciations that might pose challenges. For example:

  • Tsunami: The 'tsu' may be tricky; emphasize the initial 'ts' sound rather than blurring into a 's' sound.
  • Seismic: Ensure you pronounce the 'ei' as in 'eye'; it's common to confuse this with 'semic.' Be conscious of vowel sounds at the start.
  • Begins to explain: Watch for the blending of words; it’s essential to maintain clarity, especially with 'begins' and 'to,' as dropping sounds may hinder understanding.

Using a shadowing app can provide you with opportunities to practice these sounds repeatedly. By mimicking the speaker’s pronunciation and rhythm, you will improve English pronunciation significantly, making your own speech more intelligible and natural.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.