Pratica di Shadowing: Nanotechnology and Its Applications - Impara a parlare inglese con i video

Creazione lezione...
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Part 4 You will hear part of a lecture on nanotechnology and its applications.
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First, you have some time to look at questions 31 to 40.
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Now listen carefully and answer questions 31 to 40.
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Today's lecture is the first of a series of lectures on nanotechnology.
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Nanotechnology, sometimes shortened to nanotech, refers to the manipulation of matter on an atomic and molecular level.
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It's the science, engineering and technology conducted at the nanoscale, which is about 1 to 100 nanometres.
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It is the study and application of extremely small things and can be used across all the other science fields.
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Just how small is that?
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A nanometre is one billionth of a metre.
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The idea of nanoscale research first started from a physicist called Richard Feynman in 1959,
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He envisaged a process in which scientists would be able to manipulate and control individual atoms and molecules.
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In fact, it wasn't until 1981, with the invention of a special kind of microscope, that modern nanotechnology truly began.
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Even though nanotechnology has created many new materials and devices with a vast range of applications, there is always concern over these unnatural products.
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Many people are worried that they may pose a threat to the environment, health and safety, also known as EHS.
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In order to better understand and evaluate the potential harm, risk assessment has been introduced.
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There are also ongoing international collaborations on nanoEHS research and related policy issues.
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Despite the concern nanotechnology has benefited society in unexpected ways, In the food processing industry,
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nanotechnology is leveraged against iron deficiency, which triggers anemia.
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For example, by reducing the particle size in potatoes,
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this new technology improves the bioavailability of this nutritional ingredient without the tendency to cause colour and odour changes.
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In terms of packaging, nanomaterials are more economical and are used in all sorts of products, chocolate in particular.
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Nanotechnology can also enhance the flavour of food.
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On a domestic scale, we expect more smart furniture, which is made of shape memory alloys, to be manufactured.
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But nanotechnology has much wider application than this and could also help develop sustainable agriculture.
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It offers great potential to strengthen the effect of fertilizers, thereby minimizing the environmental impact and boosting the productivity of plants in the soil.
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In the area of medicine, bioengineers have developed simple and inexpensive nanoscale delivery vehicles,
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Conductors like carbon nanotubes have been invented with varying structures.
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Such nanotubes have become increasingly attractive to researchers because of their ability to efficiently deliver drugs into veins.
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This means that higher doses of drugs loaded on them can be transported from the administration sites to the effects -related sites, such as cancer focuses.
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thus decreasing toxic side effects while increasing the treatment effects.
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The research team has also developed a widely accepted material that can be used to coat different surfaces, including wood, plastic and glass.
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It is mainly comprised of silver.
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Such nanoparticles can eventually kill some microbes due to the antiseptic properties.
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The whole process is simple, easy to apply and, more importantly, harmless to the environment.
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Surprisingly, nanotechnology has major implications for our health as well.
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By changing the metabolic rate through a particular type of protein, obese patients are able to burn calories faster, even under a high calorie diet.
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Therefore, treatment programs are provided for patients to lose weight by disposing of excess fat in a relatively safer manner.
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The finding may help explain why overweight people struggle to lose weight.
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Their stored fat is actively fighting against their efforts to burn it off at the molecular level.
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Further research is mainly focused on the clinical and commercial developments of therapies for obesity,
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diabetes and other associated conditions such as heart disease.
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In terms of cosmetics, the applications of nanotechnology and nanomaterials can be found in many products.
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There are two main uses for nanotechnology in cosmetics.
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caused by the sun.
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In addition, nanotechnology has played an important role in delivering active ingredients to the skin.
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The mechanism proves to improve the bioavailability of actives and enhance skin hydration.
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The wide variety of nanotechnology applications leave no doubt that this field will only continue to get more exciting,
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and I look forward to seeing these developments further branch out.
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That is the end of part four.
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You now have one minute to check your answers to part four.
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Per chi è questo video?

Questo video è perfetto per gli studenti di inglese a livello intermedio o avanzato che vogliono migliorare la comprensione auditiva e la pronuncia, soprattutto in contesti accademici. Ideale per chi si interessa di scienza e tecnologia, ma anche per chi vuole esercitarsi con un linguaggio tecnico e specifico. È ottimo per la pratica del shadowing in inglese, poiché la lezione è parlata a un ritmo costante e chiaro, con spiegazioni dettagliate che facilitano il follow-up.

Parole e espressioni da rubare

  • Nanotecnologia: La manipolazione di materia a livello atomico e molecolare. "La nanotecnologia sta cambiando l'industria alimentare."
  • Bio-disponibilità: Capacità di un nutriente di essere assorbito dal corpo. "La riduzione delle particelle migliora la bio-disponibilità del ferro nelle patate."
  • Vettori di consegna: Strumenti per trasportare farmaci o sostanze nel corpo. "I nanotubi di carbonio sono ottimi vettori di consegna per i farmaci."
  • Effetti collaterali tossici: Reazioni indesiderate di un farmaco. "La nanotecnologia riduce gli effetti collaterali tossici delle terapie anticancerose."

Come migliorare l'accento: focus sulla pronuncia

Il speaker del video ha un tono chiaro e una pronuncia standard, ma ci sono alcuni punti da notare per il shadowing. Presta attenzione alla pronuncia di parole lunghe come nanotecnologia (nano-tek-NO-lo-gia) e bio-disponibilità (bi-o-dis-po-ni-BI-li-tà), dove la stressazione cade sulla penultima sillaba. Inoltre, le congiunzioni come "therefore" o "however" sono pronunciate velocemente, quasi come "th'erfore" o "how'ever" – questo è tipico dell'inglese parlato. Per esercitarti, usa un shadowing site e ripeti le frasi immediatamente dopo il speaker, cercando di imitare il ritmo e l'intonazione. Ricorda che il shadow speak non è solo ripetere, ma anche capire il contesto per rendere la pronuncia più naturale. Prova a fare esercizi di shadowspeak con le parti più tecniche del video: così migliorerai sia la comprensione che l'espressione.

Cos'è la tecnica dello Shadowing?

Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.

Tecnica dello shadowing: leggi la guida completa passo dopo passo →