Pratique du Shadowing: TOEFL Listening Practice 2026 4 Academic Talks Answer Key - Apprendre l'anglais à l'oral avec la vidéo
Création de la leçon...
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Bye.
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Bye.
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Today we're examining a process that underpins all life on Earth.
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The Carbon Cycle Carbon is never created or destroyed.
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It simply moves between four major reservoirs: the atmosphere,
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the oceans, the land biosphere and geological formations like fossil fuels.
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Plants absorb carbon dioxide from the atmosphere during photosynthesis, converting it into organic matter.
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When animals eat plants, that carbon moves up the food chain.
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When organisms die and decompose, decomposers break them down releasing carbon back into the soil and atmosphere.
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Meanwhile, the oceans act as enormous carbon sinks.
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dissolving CO2 directly from the air and supporting marine photosynthesis.
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The cycle becomes problematic when human activity disrupts its balance.
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Burning fossil fuels releases carbon that was stored underground for millions of years.
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flooding the atmosphere far faster than natural sinks can absorb it.
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This imbalance is the core driver of climate change.
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Understanding the cycle reveals why reducing emissions and protecting forests are two sides of the same coin.
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In social psychology, one of the most quietly powerful forces shaping our preferences is known as the mere exposure effect.
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The principle is elegantly simple.
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The more frequently we are exposed to a stimulus, whether a piece of music, a face or a brand logo,
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the more positively we tend to evaluate it, often without any conscious awareness that our opinion has changed.
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This was first formally studied by psychologist Robert Zionch in 1968.
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He exposed participants to novel stimuli, including Chinese characters and photographs of strangers, at varying frequencies.
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Without any additional information, people consistently rated items they had seen more often as more pleasant.
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The effect has significant implications for advertising, politics and even interpersonal relationships.
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A political candidate seen repeatedly in campaign posters may gain a familiarity advantage, independent of their policies.
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Conversely, the effect has limits.
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If initial exposure to a stimulus is strongly negative, repetition does not generate liking.
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It often amplifies the negative reaction.
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The effect works most powerfully when the first impression is neutral.
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As fresh water becomes an increasingly scarce resource,
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desalination, The process of removing salt from seawater to make it drinkable has moved from a niche technology to a global priority.
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There are two primary methods currently in widespread use: The first is thermal distillation.
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In this approach, seawater is heated until it evaporates, leaving the salt behind.
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The water vapor is then condensed back into liquid form.
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This process is energy intensive but effective and it remains dominant in oil -rich regions of the Middle East, where energy is relatively cheap.
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The second and increasingly preferred method is reverse osmosis.
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Here, seawater is pushed at high pressure through a semi -permeable membrane that only allows water molecules to pass.
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The membrane acts as a molecular filter separating salt and other impurities from the water.
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reverse osmosis is significantly more energy efficient than thermal distillation though the membranes require regular maintenance and replacement.
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Both methods produce a concentrated brine by -product
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that must be carefully managed to avoid damaging marine ecosystems if discharged back into the ocean.
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In human -robot interaction and computer graphics, There is a fascinating psychological phenomenon called the uncanny valley.
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The term was coined by Japanese roboticist Masahiro Mori, in 1970.
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Maury observed that as a robot's appearance becomes increasingly human -like, people's feelings of affinity toward it generally increase.
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but only up to a certain point.
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Once a robot or digital character becomes almost...
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but not quite.
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human in appearance, Something troubling happens.
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people begin to feel a strong sense of unease, even revulsion.
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This dip in positive feeling is the uncanny valley a metaphorical drop in the landscape of familiarity.
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The reaction is thought to be triggered by subtle mismatches.
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A face that looks human but moves incorrectly or eyes that appear lifelike.
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but lack appropriate responsiveness.
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Evolutionary psychologists suggest this response may be an adaptive defense mechanism.
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Throughout human history, subtle signs of disease, cognitive impairment or death, such as pale skin,
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irregular facial symmetry, or abnormal movement.
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signaled a potential social or biological threat.
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A near -human entity that seems "off" may trigger the same ancient warning system.
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This helps explain why early CGI human characters in films were so commonly reported as creepy.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau C1 s’appuie sur la vidéo « TOEFL Listening Practice 2026 4 Academic Talks Answer Key ». Les mots qui reviennent le plus souvent : carbon, atmosphere, becomes, effect, seawater. Cette vidéo contient 59 phrases et 702 mots à répéter en shadowing. La partie parlée dure 10:03. Le locuteur parle lentement, environ 70 mots par minute, ce qui laisse le temps d’imiter chaque son. Seuls 70 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| seawater nom | eau de mer | |
| stimulus nom | /ˈstɪm.jə.ləs/ | stimulus |
| distillation nom | /dɪstɪˈleɪʃən/ | distillation |
| familiarity nom | /fəmɪliˈæɹɪti/ | familiarité |
| osmosis nom | /ɑzˈmoʊ̯sɪs/ | osmose |
| photosynthesis nom | /ˌfoʊ.toʊˈsɪn.θə.sɪs/ | photosynthèse |
| uncanny adjectif | /ʌnˈkæni/ | déroutant, déroutante |
| psychologist nom | /ˌsaɪˈkɑl.ə.d͡ʒɪst/ | psychologue |
| absorb verbe | /æbˈsɔɹb/ | absorber |
| membrane nom | /ˈmɛm.bɹeɪn/ | membrane |
| expose verbe | /ɪkˈspoʊz/ | exposer, dénoncer |
| fossil nom | /ˈfɑsl̩/ | fossile |
| thermal adjectif | /ˈθɜːməl/ | thermique |
| amplify verbe | /ˈæm.plə.faɪ/ | amplifier |
| biosphere nom | /ˈbaɪəʊˌsfɪə(ɹ)/ | biosphère |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | is never created · was stored · is known |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has changed · has moved |
Prononciation à surveiller
- Les sons « th »: photosynthesis /ˌfoʊ.toʊˈsɪn.θə.sɪs/, thermal /ˈθɜːməl/
- Les sons « sh » et « zh »: distillation /dɪstɪˈleɪʃən/, desalination /diːˌsælɪˈneɪʃən/, repetition /ˌɹɛp.əˈtɪʃ.ən/, revulsion /ɹɪˈvʌlʃən/, implication /ˌɪmpləˈkeɪʃən/
- Mots longs — placez bien l’accent: distillation /dɪstɪˈleɪʃən/, familiarity /fəmɪliˈæɹɪti/, photosynthesis /ˌfoʊ.toʊˈsɪn.θə.sɪs/, psychologist /ˌsaɪˈkɑl.ə.d͡ʒɪst/, decomposer /diːkəmˈpəʊzə(ɹ)/
Les sons difficiles pour les francophones :
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: psychologist /ˌsaɪˈkɑl.ə.d͡ʒɪst/, mismatch /ˈmɪs.mæt͡ʃ/, geological /ˌd͡ʒi.əˈlɑdʒ.ɪk.əl/, niche /nɪt͡ʃ/, discharge /dɪsˈtʃɑɹdʒ/
- /r/ anglais — langue recourbée, sans frotter la gorge: familiarity /fəmɪliˈæɹɪti/, absorb /æbˈsɔɹb/, membrane /ˈmɛm.bɹeɪn/, biosphere /ˈbaɪəʊˌsfɪə(ɹ)/, decomposer /diːkəmˈpəʊzə(ɹ)/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme seawater, stimulus, distillation.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.