Shadowing Practice: Why Don't Blue Whales Eat Fish? - Learn English Speaking with Video
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The most massive land animals in the world all eat little stuff, grass and leaves.
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And almost all of the most massive aquatic animals also eat something itty-bitty,
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tiny crustaceans called krill.
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Why do such big things eat such small things?
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Hi, I'm David, and this is MinuteEarth.
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The most ginormous animals all need to eat a huge amount of calories to fuel their massive bodies.
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But there aren't enough big,
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super calorie-dense meals around for them to eat.
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And even if there were,
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the giant's massive bodies aren't mobile or agile enough to actually capture that food.
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Instead, these mega-creatures meet their mega-calorie quota with something that's super-abundant
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and requires almost no effort to procure — little pieces of grass and leaves.
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And for our purposes, we're going to consider leaves to be little,
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even if they do come off of bigger things.
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And sure, leaves and grass aren't very calorie-dense compared to things other animals eat,
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but the giant's giant digestive tracts can hold a lot of them at once — we're talking hundreds of kilograms.
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Plus, the bigger an animal is,
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the longer the food stays in its digestive system,
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and the more microbes there are in there to break it down.
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All of that means that the giants are able to wring a lot of calories from grass and leaves,
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enough to meet their huge calorie demands.
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The abundance and ease of finding leaves and grass,
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and the specialized digestive systems to deal with large quantities of them,
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are why, at least on land,
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you see the same pattern in every biome.
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The very biggest animals are herbivores.
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Even back in the day when dinosaurs roamed the earth,
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the biggest animals weren't predators like T-Rexes,
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they were lumbering, leap-eating vegetarians.
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But what about the ocean?
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Like their counterparts on land,
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sea giants like blue whales are relatively unagile and have giant guts,
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so it makes sense that they'd eat the ocean equivalent of grass,
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huge blooms of tiny plant-like microorganisms called bitoplankton.
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But these ocean behemoths need so many calories every day that phytoplants,
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even lots and lots and lots of them,
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just aren't calorie dense enough to meet the demand.
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Luckily, those big phytoplankton blooms attract something else,
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billions of calorie packed krill that come together to graze in huge,
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slow moving, easy to find swarms.
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A blue whale that lunges back
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and forth through a swarm can easily take in more than enough calories to power its huge body.
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The equivalent on land would be if there were huge,
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slow moving swarms of grasshoppers that elephants could munch on instead of the grass itself.
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In that case, the pachyderms could pack in even more calories and likely get even bigger.
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Either way though, the same truth holds.
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For the biggest animals on earth,
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it turns out, food things come in small packages.
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Woordenschat en spreektips bij deze les
Deze spreekles op niveau C1 is gebaseerd op de video “Why Don't Blue Whales Eat Fish?”. Deze woorden komen het vaakst terug: calorie, animal, grass, eat, leaves. Deze video bevat 48 zinnen en 485 woorden om na te spreken. Het gesproken deel duurt 2:18. De spreker praat snel, ongeveer 211 woorden per minuut, dus reken op verbonden en ingeslikte klanken. Slechts 79% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden, dus de woordenschat is pittig.
Belangrijke woorden in deze video
De 15 moeilijkste woorden uit de video, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| calorie zelfstandig naamwoord | /ˈkæləɹi/ | calorie |
| swarm zelfstandig naamwoord | /swɔɹm/ | zwerm |
| dense bijvoeglijk naamwoord | /ˈdɛns/ | dicht |
| krill zelfstandig naamwoord | /kɹɪl/ | krill |
| whale zelfstandig naamwoord | /ˈweɪl/ | walvis |
| crustacean zelfstandig naamwoord | /kɹʌsˈteɪʃən/ | schaaldier, crustacee |
| grasshopper zelfstandig naamwoord | /ˈɡɹæsˌhɑpəɹ/ | sprinkhaan |
| herbivore zelfstandig naamwoord | /ˈ(h)ɜːɹbɪvɔːɹ/ | herbivoor, planteneter |
| kilogram zelfstandig naamwoord | /ˈkɪləɡɹæm/ | kilogram |
| microbe zelfstandig naamwoord | /ˈmaɪkɹoʊb/ | microbe |
| microorganism zelfstandig naamwoord | /ˌmaɪ.kɹoʊˈɔɹ.ɡəˌnɪz.m̩/ | micro-organisme |
| procure werkwoord | /pɹəˈkjʊɹ/ | verwerven, verkrijgen |
| quota zelfstandig naamwoord | /ˈkwəʊ.tə/ | quotum |
| aquatic bijvoeglijk naamwoord | /əˈkwɑ.tɪk/ | aquatisch, aquatische |
| counterpart zelfstandig naamwoord | /ˈkaʊntɚˌpɑɹt/ | tegenhanger, complement |
Phrasal verbs die je zult horen
| Woord | Betekenis |
|---|---|
| turn out werkwoord | uitvallen, resulteren |
Uitspraak om op te letten
De spreker gebruikt 9 samentrekkingen en verkorte vormen, zoals aren't, we're, I'm. Spreek ze kort uit, zoals je ze hoort.
- De klanken “sh” en “zh”: crustacean /kɹʌsˈteɪʃən/, specialize /ˈspɛʃəˌlaɪz/
- Lange woorden — let op de klemtoon: microorganism /ˌmaɪ.kɹoʊˈɔɹ.ɡəˌnɪz.m̩/, phytoplankton /ˌfaɪ.təˈplæŋk.tən/, vegetarian /vɛ.d͡ʒɪˈtɛ.ɹi.ən/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: digestive /daɪˈdʒɛstɪv/, microbe /ˈmaɪkɹoʊb/, specialize /ˈspɛʃəˌlaɪz/
- /æ/ — opener dan de Nederlandse “e”: calorie /ˈkæləɹi/, grasshopper /ˈɡɹæsˌhɑpəɹ/, kilogram /ˈkɪləɡɹæm/, pachyderm /ˈpæk.ɪˌdɜː(ɹ)m/, phytoplankton /ˌfaɪ.təˈplæŋk.tən/
- /g/ — een harde plofklank, geen Nederlandse “g”: mega /ˈmɛɡə/, grasshopper /ˈɡɹæsˌhɑpəɹ/, kilogram /ˈkɪləɡɹæm/, microorganism /ˌmaɪ.kɹoʊˈɔɹ.ɡəˌnɪz.m̩/, guts /ɡʌts/
Zo oefen je met deze video
- Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
- Begin op 0,75× snelheid, spreek zin voor zin na en ga terug naar normale snelheid zodra het makkelijk gaat.
- Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als calorie, swarm, dense.
Wat is de Shadowing-techniek?
Shadowing is een wetenschappelijk onderbouwde taalleermethode die oorspronkelijk is ontwikkeld voor professionele tolkentraining en gepopulariseerd door polyglot Dr. Alexander Arguelles. De methode is eenvoudig maar krachtig: je luistert naar native Engelse audio en herhaalt het onmiddellijk hardop — als een schaduw die de spreker volgt met slechts 1–2 seconden vertraging. In tegenstelling tot passief luisteren of grammaticadrills, dwingt shadowing je hersenen en mondspieren om echte spraakpatronen tegelijkertijd te verwerken en te reproduceren. Onderzoek toont aan dat het de uitspraaknauwkeurigheid, intonatie, ritme, verbonden spraak, luisterbegrip en spreekvaardigheid aanzienlijk verbetert — waardoor het een van de meest effectieve methoden is voor IELTS Speaking-voorbereiding en echte Engelse communicatie.