Pratica di Shadowing: Nanotechnology: technology on a small scale | IELTS LISTENING TEST | SECTION-4 - Impara a parlare inglese con i video
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You will hear a woman talking to a group of first year science undergraduates about the developing science of nanotechnology.
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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 we're going to look at an important area of science, namely nanotechnology. So, what is it?
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Nano means tiny, so it's science and engineering on the scale of atoms and molecules.
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The idea is that by controlling and rearranging atoms, you can literally create anything.
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However, as we'll see, the science of the small has some big implications, affecting us in many ways.
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There's no doubt that nanotechnology promises so much for civilization.
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However, all new technologies have their teething problems.
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and with nanotechnology, society often gets the wrong idea about its capabilities.
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Numerous science fiction books and movies have raised people's fears about nanotechnology.
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With scenarios such as inserting little nanorobots into your body that monitor everything you do without you realising it.
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or self -replicating nano robots that eventually take over the world.
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So how do we safeguard such a potentially powerful technology?
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Some scientists recommend that nanoparticles be treated as new chemicals, with separate safety tests and clear labelling.
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They believe that greater care should also be taken with nanoparticles in laboratories and factories.
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Others have called for a withdrawal of new nanoproducts, such as cosmetics, and a temporary halt to many kinds of nanotech research.
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But as far as I'm concerned, there's a need to plough ahead with the discoveries and applications of nanotechnology.
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I really believe that most scientists would welcome a way to guard against unethical uses of such technology.
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We can't go around thinking that all innovation is bad.
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All advancement is bad.
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As with a debate about any new technology, It is how you use it that's important.
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So, let's look at some of its possible uses.
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Thanks to nanotechnology, there could be a major breakthrough in the field of transportation, with the production of more durable metals.
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These could be virtually unbreakable, lighter and much more pliable, leading to planes that are 50 times lighter than at present.
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Those same improved capabilities will dramatically reduce the cost of travelling into space.
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making it more accessible to ordinary people and opening up a totally new holiday destination.
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In terms of technology, the computer industry will be able to shrink computer parts down to minute sizes.
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We need nanotechnology in order to create a new generation of computers
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that will work even faster and will have a million times more memory, but will be about the size of a sugar cube.
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Nanotechnology could also revolutionise the way that we generate power.
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The cost of solar cells will be drastically reduced, so harnessing this energy will be far more economical than at present.
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But nanotechnology has much wider applications than this and could have an enormous impact on our environment.
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For instance, tiny airborne nanorobots could be programmed to actually rebuild the ozone layer,
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which could lessen the impact of global warming on our planet.
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That's a pretty amazing thought, isn't it?
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On a more local scale,
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this new technology could help with the clean -up of environmental disasters as nanotechnology will allow us to remove oil
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and other contaminants from the water far more effectively.
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and if nanotechnology progresses as expected as a sort of building block set of about 90 atoms
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then you could build anything you wanted from the bottom up In terms of production, this means that you only use what you need.
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And so there wouldn't be any waste.
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The notion that you could create anything at all has major implications for our health.
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It means that we'll eventually be able to replicate anything.
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This would have a phenomenal effect on our society.
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In time, it could even lead to the eradication of famine through the introduction of machines
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that produce food to feed the hungry.
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But it's in the area of medicine that nanotechnology may have its biggest impact.
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How we detect disease will change as tiny biosensors are developed to analyze tests in minutes rather than days.
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There's even speculation nanorobots could be used to slow the aging process, lengthening life expectancy.
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As you can see, I'm very excited by the implications that could be available to us in the next few decades.
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Just how long it'll take, I honestly don't know.
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That is the end of Section 4.
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You now have half a minute to check your answers.
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Thank you.
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Vocabolario e note di pronuncia per questa lezione
Questo video contiene 55 frasi e 749 parole da ripetere con lo shadowing. Il parlato dura 6:52. Chi parla lo fa lentamente, circa 109 parole al minuto, quindi c’è tempo per imitare ogni suono. Il 82% delle parole rientra nelle 3.000 più comuni dell’inglese; conviene studiare le altre prima di iniziare.
Vocaboli chiave di questo video
15 parole meno comuni del video, con pronuncia e significato:
- atom /ˈætəm/ (sostantivo) — atomo. The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
- implication /ˌɪmpləˈkeɪʃən/ (sostantivo) — implicazione, risvolto. The act of implicating.
- hungry /ˈhʌŋ.ɡɹi/ (aggettivo) — affamato, avere fame. Affected by hunger; having the physical need for food.
- scientist /ˈsaɪəntəst/ (sostantivo) — scienziato, scienziata. One whose activities make use of the scientific method to answer questions regarding the measurable universe. A scientist may be involved in original research…
- capability /ˌkeɪ.pəˈbɪl.ɪ.ti/ (sostantivo) — capacità, possibilità. The power or ability to generate an outcome.
- replicate /ˈɹɛplɪkeɪt/ (verbo) — replicare. To make a copy (replica) of.
- temporary /ˈtɛmp(əˌɹ)ɛɹi/ (aggettivo) — temporaneo. Not permanent; existing only for a period or periods of time.
- carefully /ˈkɛɹf(ə)li/ (avverbio) — minuziosamente, accuratamente. With care; attentively, circumspectly.
- discovery /dɪˈskʌv.ɹi/ (sostantivo) — scoperta, scoprimento. Something discovered.
- fiction /ˈfɪkʃən/ (sostantivo) — finzione. Literary type using invented or imaginative writing, instead of real facts, usually written as prose.
- label /ˈleɪ.bəl/ (sostantivo) — etichetta. A small ticket or sign giving information about something to which it is attached or intended to be attached.
- ordinary /ˈɔɹdɪnɛɹi/ (aggettivo) — ordinario, ordinaria. Having regular jurisdiction; now only used in certain phrases.
- layer /ˈleɪ̯ɚ/ (sostantivo) — strato. A single thickness of some material covering a surface.
- disaster /dɪˈzɑːs.təː/ (sostantivo) — disastro. An unexpected natural or man-made catastrophe of substantial extent causing significant physical damage or destruction, loss of life or sometimes permanent…
- potentially /pəˈtɛnʃ(ə)li/ (avverbio) — potenzialmente. In a manner showing much potential; with the possibility of happening in a given way.
I phrasal verb che sentirai
- look at (verbo) — guardare. To observe or watch.
- open up (verbo) — aprire. To open.
- take over (verbo) — usurpare. To assume control of something, such as a business or enterprise, and sometimes by force.
Pronuncia a cui fare attenzione
Chi parla usa 10 contrazioni e forme ridotte, come I'm, we'll, can't. Pronunciale nella forma breve, così come le senti.
- I suoni “th”: withdrawal /wɪðˈdɹɔ(ə)l/, breakthrough /ˈbɹeɪk.θɹuː/, lengthen /ˈlɛŋθən/, teethe /tiːð/, unethical /ʌnˈɛθɪkəl/
- I suoni “sh” e “zh”: implication /ˌɪmpləˈkeɪʃən/, fiction /ˈfɪkʃən/, potentially /pəˈtɛnʃ(ə)li/, innovation /ˌɪn.əˈveɪ.ʃən/, destination /dɛstɪˈneɪʃən/
- Parole lunghe — attenzione all’accento: implication /ˌɪmpləˈkeɪʃən/, capability /ˌkeɪ.pəˈbɪl.ɪ.ti/, temporary /ˈtɛmp(əˌɹ)ɛɹi/, ordinary /ˈɔɹdɪnɛɹi/, potentially /pəˈtɛnʃ(ə)li/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Fai shadowing frase per frase a velocità normale, ripetendo ognuna finché il tuo ritmo coincide con quello di chi parla.
- Registrati e confronta con l’originale, facendo attenzione a parole come atom, implication, hungry.
La grammatica di questo video
Le strutture che chi parla usa di più, con le parole esatte del video:
| Struttura | Nel video |
|---|---|
| Forma passiva be + participio passato — conta ciò che accade, non chi lo fa | be treated · be taken · could be programmed |
| Present perfect have/has + participio passato — un’azione passata che conta ancora adesso | have raised · have called |
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.