Shadowing Practice: Biology overview - Learn English Speaking with Video

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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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Vocabulario y notas de pronunciación para esta lección

Esta lección de conversación de nivel C1 se basa en el vídeo “Biology overview”. Las palabras que más se repiten: biology, fascinating, energy, cell, questions. Este vídeo tiene 63 frases y 755 palabras para practicar shadowing. La parte hablada dura 4:32. El hablante habla a un ritmo natural de unas 166 palabras por minuto, cercano a una conversación cotidiana. El 86 % de las palabras está entre las 3.000 más comunes del inglés; conviene repasar el resto antes de empezar. 11 de sus 63 frases son preguntas, así que sirve para practicar la entonación de las preguntas y las respuestas cortas.

Vocabulario clave de este vídeo

Las 15 palabras más avanzadas del vídeo, con su pronunciación y significado:

PalabraPronunciaciónSignificado
fascinate verbo/ˈfæsɪneɪt/fascinar
bacterium sustantivo/bækˈtɪəɹ.ɪəm/bacteria
molecule sustantivo/ˈmɑ.lɪ.kjul/molécula
emerge verbo/ɪˈmɝd͡ʒ/emerger, aparecer
microscopic adjetivo/ˌmaɪ.kɹəˈskɑ.pɪk/microscópico
muffin sustantivo/ˈmʌf.ɪn/panecillo, muffin
reproduce verbo/ˌɹi.pɹəˈdus/reproducir
insect sustantivo/ˈɪn.sɛkt/insecto
complexity sustantivo/kəmˈplɛk.sɪ.ti/complejidad
eerily adverbio/ˈɪɹ.ɪ.li/espeluznantemente, inquietantemente
excite verbo/ɪkˈsaɪt/emocionar
inanimate adjetivo/ɪnˈænɪmət/inanimado
physicist sustantivo/ˈfɪzɪsɪst/físico, física
chemist sustantivo/ˈkɛmɪst/químico, química
offend verbo/əˈfɛnd/ofender

Phrasal verbs que vas a escuchar

PalabraSignificado
move around verbomovilizarse

Frases que vale la pena repetir

Frases cortas y completas del vídeo que puedes reutilizar en la conversación diaria:

  • 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.

Pronunciación a tener en cuenta

El hablante usa 20 contracciones y formas reducidas, como we're, I'm, don't. Dilas en su forma corta, tal como las oyes.

  • Palabras largas — cuida el acento: microscopic /ˌmaɪ.kɹəˈskɑ.pɪk/, complexity /kəmˈplɛk.sɪ.ti/, inanimate /ɪnˈænɪmət/, metabolism /məˈtæb.əˌlɪz.əm/, reproduction /ˌɹiːpɹəˈdʌkʃən/

Sonidos difíciles para hispanohablantes:

  • /z/ — sonora, no /s/: physicist /ˈfɪzɪsɪst/, metabolism /məˈtæb.əˌlɪz.əm/, buzz /bʌz/
  • /dʒ/ — no es la “y” ni la “ch”: emerge /ɪˈmɝd͡ʒ/, strangely /ˈstɹeɪnd͡ʒli/

Cómo practicar con este vídeo

  1. Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
  2. Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
  3. Grábate y compara con el original, prestando atención a palabras como fascinate, bacterium, molecule.

¿Qué es la Técnica de Shadowing?

Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.

Técnica de shadowing: lee la guía completa paso a paso →