Pratica di Shadowing: All About Hydroelectricity - Impara a parlare inglese con i video
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In a similar way that a wind turbine uses the kinetic energy in wind to produce electrical energy,
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people can also use the energy in moving water to produce electrical energy.
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Electricity produced using moving water is called hydroelectricity or hydropower.
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Hydroelectricity uses the kinetic energy in flowing rivers and streams.
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The water is often held in large dams which allow people to control the flow of water.
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When the water in a dam is released, it pushes past generators that convert kinetic energy into electricity.
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The electricity travels along power lines to power stations, where it is sent along an electrical grid to our homes and cities.
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A few of the advantages of hydroelectricity are that it is renewable,
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it provides consistent power, and like solar energy and wind turbines, it does not release any pollutants into the air.
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The disadvantages of hydroelectricity are that it requires a lot of water.
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The water is either dammed up or diverted from its natural course.
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This can affect the organisms that rely on water upstream and in surrounding areas.
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Check out our related videos on the advantages and disadvantages of other electricity production methods.
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Thank you.
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Vocabolario e note di pronuncia per questa lezione
Questo video contiene 14 frasi e 195 parole da ripetere con lo shadowing. Il parlato dura 1:49. Chi parla lo fa lentamente, circa 107 parole al minuto, quindi c’è tempo per imitare ogni suono. Solo il 77% delle parole rientra nelle 3.000 più comuni dell’inglese, quindi il lessico è impegnativo.
Vocaboli chiave di questo video
15 parole meno comuni del video, con pronuncia e significato:
- dam /ˈdæm/ (sostantivo) — argine, diga. A structure placed across a flowing body of water to stop the flow or part of the flow, generally for purposes such as retaining or diverting some of the water…
- disadvantage /ˌdɪsədˈvæntɪd͡ʒ/ (sostantivo) — svantaggio. A weakness or undesirable characteristic; con; drawback.
- turbine /ˈtɜː.baɪn/ (sostantivo) — turbina, rotore. Any of various rotary machines that use the kinetic energy of a continuous stream of fluid (a liquid or a gas) to turn a shaft.
- consistent /kənˈsɪs.tənt/ (aggettivo) — costante, continuo. Of a regularly occurring, dependable nature.
- rely /ɹɪˈlaɪ/ (verbo) — fare affidamento, basarsi. To trust; to have confidence in; to depend.
- grid /ɡɹɪd/ (sostantivo) — griglia, grata. A rectangular array of squares or rectangles of equal size, such as in a crossword puzzle.
- convert /kənˈvɝt/ (verbo) — convertire. To transform or change (something) into another form, substance, state, or product.
- generator /ˈdʒɛnəɹeɪtə(ɹ)/ (sostantivo) — generatore. An apparatus in which vapour or gas is formed from a liquid or solid by means of heat or chemical process, as a steam boiler, gas retort etc.
- renewable /ɹɪˈnu.ə.bl̩/ (aggettivo) — rinnovabile. Able to be renewed; capable of renewal.
- surround /səˈɹaʊnd/ (verbo) — circondare. To encircle something or simultaneously extend in all directions.
- organism /ˈɔɹ.ɡəˌnɪz.əm/ (sostantivo) — organismo. A discrete and complete living thing, such as animal, plant, fungus or microorganism.
- upstream /ʌpˈstɹiːm/ (aggettivo) — a monte. In a direction against the flow of a current or stream of fluid (typically water); upriver.
- hydroelectricity (sostantivo) — idroelettricità. Electricity that is produced from the energy of moving water.
- kinetic /kɪˈnɛtɪk/ (aggettivo) — cinetico. Relating to motion.
- divert /daɪˈvɝt/ (verbo) — distrarre. To turn aside from a course.
I phrasal verb che sentirai
- check out (verbo) — investigare. To record the departure or withdrawal of someone or something (such as guests, employees, books, etc.).
Pronuncia a cui fare attenzione
- Parole lunghe — attenzione all’accento: electricity /ɪˌlɛkˈtɹɪsɪti/, electrical /ɪˈlɛktɹɪkəl/, disadvantage /ˌdɪsədˈvæntɪd͡ʒ/, generator /ˈdʒɛnəɹeɪtə(ɹ)/, organism /ˈɔɹ.ɡəˌnɪz.əm/
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 dam, disadvantage, turbine.
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 | is called · is often held · is released |
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.