Prática de Shadowing: What Is 3D Printing and How Does It Work? | Mashable Explains - Aprenda a falar inglês com vídeo

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3D printing technology is already changing the way we produce objects, from tools and toys, to clothing, and even body parts.
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3D printing is part of a process known as additive manufacturing, where an object is created by adding material layer by layer.
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Additive manufacturing allows designers to create complex parts for machines, airplanes, and cars at a fraction of the cost and time of standard means like forging,
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molding, and sculpting.
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Now, smaller, consumer -friendly 3D printers are bringing additive manufacturing to homes and businesses.
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The first step in 3D printing is to create a blueprint of the object you want to print.
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You can use modeling software like Blender to create your own designs,
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or you can visit websites like Thingiverse or Shapeways to find objects other users have 3D modeled.
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Once you have a finished design, it's time to send it to the printer.
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Some printers, like the MakerBot Replicator 2, have renewable bioplastics spooled in the back of the device, almost like a string.
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When the printer receives the data, it pulls the material through a tube, melts it, and deposits it to the plate where it instantly cools.
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As you can see, the 3D object is created through layering,
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where the printer will add one layer of the object at a time until you have a fully formed structure.
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The most common material used in 3D printing is plastic,
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but the use of some other materials allow for the creation of some pretty amazing products beyond simple tools and toys.
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3D printing food is becoming very popular, and additive manufacturing has allowed for the creation of some pretty intricate treats.
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In the medical world, doctors are testing biomaterials for regenerative medicine.
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By using a patient's cells, doctors could 3D print small body parts like ears and noses.
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Some surgeons have even tested 3D printed organs for transplants.
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Recently, giant 3D printers in China printed 10 houses in just one day
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and at a cost of less than $5 ,000 per house, proving just how cost and time efficient 3D printing can be.
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For more on 3D printing, check out Mashable's latest coverage.
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And don't forget to watch the other videos in our Mashable Explains series.

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Vocabulário e dicas de fala para esta lição

Esta aula de conversação usa o vídeo “What Is 3D Printing and How Does It Work?”. As palavras que mais se repetem: printing, printer, object, additive, manufacturing. Este vídeo tem 23 frases e 366 palavras para praticar shadowing. A fala dura 2:20. O falante fala em ritmo natural, cerca de 157 palavras por minuto, próximo de uma conversa do dia a dia. Apenas 75% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.

Vocabulário principal deste vídeo

15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:

PalavraPronúnciaSignificado
printer substantivo/ˈpɹɪntɚ/impressor
layer substantivo/ˈleɪ̯ɚ/camada
toy substantivo/tɔɪ/brinquedo
clothing substantivo/ˈkloʊðɪŋ/roupa, veste
ear substantivo/ˈɪə̯/ouvido, orelha
designer substantivo/dɪˈzaɪnɚ/desenhador, desenhadora
efficient adjetivo/ɪˈfɪʃənt/eficiente
string substantivo/stɹɪŋ/barbante, corda
tube substantivo/tuːb/tubo, bisnaga
deposit substantivo/dɪˈpɑ.zɪt/depósito
instantly advérbio/ˈɪnstəntli/instantaneamente
organ substantivo/ˈɔːɡən/órgão
surgeon substantivo/ˈsɝd͡ʒən/cirurgião
fraction substantivo/ˈfɹæk.ʃən/fração, fracção
melt verbo/mɛlt/derreter, fundir

Phrasal verbs que você vai ouvir

PalavraSignificado
check out verboverificar, sacar só

Gramática neste vídeo

As estruturas que o falante mais usa, com as palavras exatas do vídeo:

EstruturaNo vídeo
Present perfect have/has + particípio passado — uma ação passada que ainda importa agorahas allowed · have even tested
Voz passiva be + particípio passado — o foco está no que acontece, não em quem fazis created

Pronúncia para ficar de olho

  • Os sons de “sh” e “zh”: efficient /ɪˈfɪʃənt/, fraction /ˈfɹæk.ʃən/

Sons difíceis para falantes de português:

  • Consoante final — sem acrescentar um “i” depois: efficient /ɪˈfɪʃənt/, tube /tuːb/, deposit /dɪˈpɑ.zɪt/, melt /mɛlt/, mold /moʊld/
  • s + consoante no início — sem um “i” antes: string /stɹɪŋ/, sculpt /skʌlpt/, spool /spuːl/

Como praticar com este vídeo

  1. Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
  2. Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
  3. Grave a sua voz e compare com o original, prestando atenção a palavras como printer, layer, toy.

O que é a Técnica de Shadowing?

Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.

Técnica de shadowing: leia o guia completo passo a passo →