Shadowing Practice: Biology overview - Learn English Speaking with Video
Les maken...
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I would like to welcome you to Biology at Khan Academy.
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And biology, as you might know, is the study of life.
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And I can't really imagine anything more interesting than the study of life.
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And when I say "life," I'm not just talking about us, human beings.
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I'm talking about all animals.
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I'm talking about plants.
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I'm talking about bacteria.
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And it really is fascinating.
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How do we start off with inanimate molecules and atoms?
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You know, this right here is a molecule of DNA.
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How do we start with things like that, and we get the complexity of living things?
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And you might be saying, well, what makes something living?
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Well, living things convert energy from one form to another.
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They use that energy to grow.
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They use that energy to change.
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And I guess growth is a form of change.
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They use that energy to reproduce.
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And these are all, in and of themselves, fascinating questions.
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How do they do this?
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You know, we look around us.
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How do we, you know, eat a muffin?
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And how does that allow us to move around and think, and do all the things we do?
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Where did the energy from that muffin come from?
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How are we similar to a plant or an insect?
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And we are eerily or strangely similar to these things.
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We actually have a lot more in common with, you know, that tree outside your window, or that insect, that bee, that might be buzzing around, than you realize.
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Even with the bacteria that you can only even see at a microscopic level.
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In fact, we have so much bacteria as part of what makes us, us.
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So these are fascinating questions.
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How did life even emerge?
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And so over the course of what you see in Biology on Khan Academy, we're going to answer these fundamental, fascinating questions.
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We're going to think about things like energy and the role of energy in life.
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We're going to think about important molecules in biology.
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And perhaps most importantly, DNA and its role in reproduction and containing information.
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And we're going to study cells, which are the basic building block of life.
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And as we'll see, even though we view cells as these super, super small, small things, cells in and of themselves are incredibly complex.
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And if you compare them to an atomic scale, they're quite large.
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In fact, this entire blue background that I have there, that's the surface of an immune cell.
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And what you see here emerging from it, these little yellow things.
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These are HIV viruses, emerging from an immune cell.
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So even though you imagine cells as these very, very small microscopic things, this incredible complexity.
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Even viruses.
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Viruses are one of these fascinating things that kind of are right on the edge between life and nonlife.
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They definitely reproduce, and they definitely evolve.
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But they don't necessarily have a metabolism.
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We'll learn a lot more about that.
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They don't necessarily use energy and growth in the same way that we would associate with life.
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And then perhaps one of the biggest questions of all is how did life come about?
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And we will study that as we look at evolution and natural selection.
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So welcome to Khan Academy's Biology section.
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I think you're going to find it fascinating.
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You're going to realize that biology, in some way, is the most complex of the sciences.
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And in a lot of ways, the one that we understand the least.
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It's going to be built on top of chemistry, which in turn is built on top of physics, which in turn is built on top of mathematics.
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And biology is one of our Frankly, even in the last hundred years, we're just starting to scratch the surface of understanding it.
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But what's really exciting is where the field of biology is going.
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As we understand things at a deeper level, at a molecular level, we're going to start thinking about how can we even do things like engineer biology, or affect the world around us?
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It's going to raise all sorts of fascinating and deep and ethical questions.
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So, hopefully you enjoy this.
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Biology is one of the most, arguably, maybe the most fascinating subject of all.
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I don't want to offend the chemists and the physicists out there.
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I actually find those quite fascinating as well.
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But we're going to answer, or attempt to start to answer, some of the most fundamental questions of our existence.
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Woordenschat en spreektips bij deze les
Deze spreekles op niveau C1 is gebaseerd op de video “Biology overview”. Deze woorden komen het vaakst terug: biology, fascinating, energy, cell, questions. Deze video bevat 63 zinnen en 755 woorden om na te spreken. Het gesproken deel duurt 4:32. De spreker praat in een natuurlijk tempo van ongeveer 166 woorden per minuut, dicht bij een alledaags gesprek. 86% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden; de rest kun je beter vooraf bekijken. 11 van de 63 zinnen zijn vragen, dus het is goede oefening voor vraagintonatie en korte antwoorden.
Belangrijke woorden in deze video
De 15 moeilijkste woorden uit de video, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| fascinate werkwoord | /ˈfæsɪneɪt/ | fascineren |
| bacterium zelfstandig naamwoord | /bækˈtɪəɹ.ɪəm/ | bacterie |
| molecule zelfstandig naamwoord | /ˈmɑ.lɪ.kjul/ | molecuul |
| emerge werkwoord | /ɪˈmɝd͡ʒ/ | opduiken |
| microscopic bijvoeglijk naamwoord | /ˌmaɪ.kɹəˈskɑ.pɪk/ | microscopisch |
| muffin zelfstandig naamwoord | /ˈmʌf.ɪn/ | muffin |
| reproduce werkwoord | /ˌɹi.pɹəˈdus/ | reproduceren |
| insect zelfstandig naamwoord | /ˈɪn.sɛkt/ | insect, kerfdier |
| complexity zelfstandig naamwoord | /kəmˈplɛk.sɪ.ti/ | ingewikkeldheid, complexiteit |
| excite werkwoord | /ɪkˈsaɪt/ | prikkelen, opwinden |
| inanimate bijvoeglijk naamwoord | /ɪnˈænɪmət/ | levenloos |
| physicist zelfstandig naamwoord | /ˈfɪzɪsɪst/ | natuurkundige, fysicus |
| chemist zelfstandig naamwoord | /ˈkɛmɪst/ | scheikundige, chemicus |
| offend werkwoord | /əˈfɛnd/ | kwetsen, beledigen |
| atom zelfstandig naamwoord | /ˈætəm/ | atoom |
Zinnen om te herhalen
Korte, volledige zinnen uit de video die je in alledaagse gesprekken kunt gebruiken:
- I'm talking about all animals.
- How do we start off with inanimate molecules and atoms?
- How do we, you know, eat a muffin?
- How are we similar to a plant or an insect?
- We're going to think about important molecules in biology.
Uitspraak om op te letten
De spreker gebruikt 20 samentrekkingen en verkorte vormen, zoals we're, I'm, don't. Spreek ze kort uit, zoals je ze hoort.
- Lange woorden — let op de klemtoon: microscopic /ˌmaɪ.kɹəˈskɑ.pɪk/, complexity /kəmˈplɛk.sɪ.ti/, inanimate /ɪnˈænɪmət/, metabolism /məˈtæb.əˌlɪz.əm/, reproduction /ˌɹiːpɹəˈdʌkʃən/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: emerge /ɪˈmɝd͡ʒ/, offend /əˈfɛnd/, evolve /ɪˈvɑlv/, buzz /bʌz/
- /æ/ — opener dan de Nederlandse “e”: fascinate /ˈfæsɪneɪt/, bacterium /bækˈtɪəɹ.ɪəm/, inanimate /ɪnˈænɪmət/, atom /ˈætəm/, metabolism /məˈtæb.əˌlɪz.əm/
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 fascinate, bacterium, molecule.
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.